. ‘4': .. 'v #312" ‘Q ,! V ‘ r bar-é _ “is? V vac. , u n! . . - 53 “.‘7‘ 1- :pna . L ' - « ."y. sci-3.. ‘1‘ 34. '9‘- V": "H‘f‘: 4 . .1. ‘ :fl-Wamwm 9- “} - . :‘I‘A . f" n6 l , ‘ > '. ' .f'. .1 . - ‘ t‘ — - u 'Uv‘ 7 > m. ‘ ,_ 5--~'va-' aw, . g; :3? m .v , - _ ‘ _ ‘ . , . . _. F ._ L. .i. ,m . V “ J33 . , . . - W ¥ - , , .rfi'i .3. - ' ’ . .. ‘ ‘ * Jfi‘u'..b' .1; _‘ ‘ , k . 1;.- v .'. . ,- —. .' . ,,_ . ‘ ' G; ' 5 ’ ' \ ' ‘ ' a“! ' ‘. n: . ‘ ' ' , < ‘ V. __ . . ‘ ‘ .. 1.4-, ' .V ‘ v'~- ’ V 32‘ . .. . . . c,v a T 'n" ' ’ . . 7.3”. 'V'.‘ fl '3“. . _, A ', , . ' ‘. v' 1 . . g , - . L . .I z ‘ 0' '. . ‘ ' .1 ' . . .2‘ '1 . j. . ' I. ‘ 'v 1‘“ ' ‘ I‘ T O ’ H A, 4"‘7". t“: _ . v}- H, ‘ , A I .‘ 'a" 4191/)! . , . . . . . 5 ‘ n.3, f 5.,— . ‘ .' ' H V » ‘- n— ” ’ ‘ . ‘ .1 . x - ‘r a +’ fihfififr?">h?’ ‘ 1“ ' -< “ .*- when fun." . . n. ,_ n . . ‘ x ‘1 ‘ ~ "‘ I ‘1‘. . - ’ Michigan Stats University 4:" chSiS This is to certify that the thesis entitled ANALYSIS OF NUCLEON-NUCLEUS SCATTERING WITH THE WKB METHOD presented by Hyang Key Lee has been accepted towards fulfillment of the requirements for fl { 7 Major professor do Date ‘3" ‘9 Pig 0-169 ABSTRACT ANALYSIS OF NUCLEON-NUCLEUS SCATTERING WITH THE WKB METHOD by Hyang Key Lee The WKB method together with the impulse approximation is applied to the inelastic scattering of 156 MeV nucleons from the nuclei 012, 015 and Ca“°. The optical potential employed includes a spin-orbit part. In general, the agree- ment between prediction and experiment for the cross-sections is impressive. The predictions by the WKB compare favorably with the results of the DWIA, although the WKB appears to predict slightly larger cross-sections than the DNIA. For normal parity states, the effect of the spin- orbit potential on the polarization is as eXpected. In the cases where spin-flip is important, the polarization is sensitive to the spin-orbit term. For Cano, the imaginary part of the spin-orbit potential contributes little to the polarization. The WKB method is applied also to the cases where the incident energy of the projectile is #0 MeV. In place of the impulse approximation, a two-body potential of the Yukawa type is assumed. The agreement between data and prediction is qualitative only. The WKB is clearly inadequate at this low energy. ANALYSIS OF NUCLEON-NUCLEUS SCATTERING WITH THE RED METHOD By Hyang Key Lee A THESIS Submitted to Michigan State University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Department of Physics and.Astronomy 1966 PLEASE NOTE: Thesis is tightly bound. Some print lost in spine. Filmed as received. UNIVERSITY MICROFILMS , INC. ACKNOWLEDGMENTS The author wishes to express deep gratitude to his parents and brother, who made it possible for him to study in this country by personal sacrifices on their part. Sincere appreciation is felt for the patient guidance and understanding provided by Professor Hugh McManus through- out this work. The author gives special thanks to his wife for her unceasing encouragement and personal endeavors in preparing this manuscript. 11 on "I h '0! ‘ IOU TABLE OF CONTENTS ACKNOWLEDGM EN T8 0 O O O O O O O O O O O O O O O 0 LI ST OF ILLUSTRATIONS O O O O O O O O O O O O O 0 LIST OF TABLES O O O O O O O O O O O O O O O O 0 LIST OF APPENDICES O O O O O O O O O O O O O O 0 Chapter I. II. III. IV. V. VI. INTBOWCTION O O O O O O O 0 O O O O O O DISTOBTED WAVE THEORY . . . . . . . . . Cross Sections and Polarizations . . . Optical Potential; Perturbation Theory Impulse Approximation . . . . . . . . "KB APPROXIMATION O O O O O O O O O O 0 FORM FACTORS . . . e e e . Nuclear States 0 e e e Isospin Dependence . . . . . . . . . . FomFaCtorSeeeeeeeeeeeee Final State for Spin S = O . . . . . Final State for Spin 3 = l, J = L . Final State for Spin 3 = l, J = L 1 DETAILED CALCULATIONS O O O O O O O O 0 Reduction of the Scattering Amplitudes Scattering Amplitudes for S = O . . Scattering Amplitudes for S = l . . Numerical Calculations . . . . . . . . DISCUSSION 0 O O O O O O O O O O O O O O 012 e e e e e e e e e e e e e 016 e e e e e e e e e e e Calm e e e e e e e e e 111 Page 11 viii ix N00 0\ l-‘ Page VII. THE WKB METHOD AT #0 MEV . . . . . . . . . . . 52 VIII. CONCLUSION . . . . . . . . . . . . . . . . . . 60 LIST OF REFERENCES . . . . . . . . . . . . . . . . . . 95 iv Figure 1. 2. 3. h. 5. 6. 7. 8. 9. 10. 11. 12. 13. lh. 15. 16. 1?. 18. 19. 20. 21. 22. LIST OF ILLUSTRATIONS Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization Cross-Section Polarization for for for for for for for for for for for h.“3 mev level of C12 9.7 MeV level of C12 12.7 MeV level of 012 15.1 MeV level of 012 16.1 MeV level of 012 18.2 MeV level of 012 19.3 MeV level of 012 21 MeV level or C12 I N I I I 22.3 mev level of 012 21.2 MeV level of 012 19.5 MeV level of c12 Page 98 99 100 101 102 103 10h 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 23. 24. 25. 26. 27. 28. 29. 3o. 31. 32. 33. 34. 35. 36. 37. 38. 39. no. 41. 42. 43. 45. 46. 47. 48. Cross-Section for Cross-Section for Polarization ” Cross-Section for Cross-Section for Polarization ” Cross-Section for Polarization ” Cross-Section for Polarization ' Cross-Section for Polarization ' Cross-Section for Cross-Section for 23.2 MeV 19.2 MeV n n 24.2 MeV 6.15 MeV 11.5 MeV 13o]. MGV 15.3 MeV 11 n 180? MeV 20.2 MeV level level level level level level level level level of C of C n n of 012 of 016 of O16 of O16 of 016 II I! of O16 of 016 Polarization for 19.1 MeV level of 015 Cross-Section for 13.5 MeV level Cross-Section for 16.6 MeV level Polarization for 17 MeV level of Cross-Section for 17.3 nev level Polarization ' Cross-Section for 17.6 Mev level Polarization ' of O16 of 016 016 of 016 of 016 Cross-Section for 20 MeV level of 016 Polarization ' Cross-Section for 20.2 MeV level of 016 Polarization ' Cross-Section for 3.7 MeV level of Ca“0 vi Page 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 Page 50. Polarization for 3.7 MeV level of Ca”0 . . . . 147 51. Polarization " " ” " ” ” . . . . 148 52. Cross-Section for 4.4 MeV level of Ca“0 . . . 149 53. Polarization ” ” " ' ” " . . . . 150 54. Cross-Section for 7.15 MeV level of C340 . . . 151 55. Polarization " ” " ” ” " . . . . 152 56. Cross-Section £8r 7.73 MeV and 8.34 MeV levels Of Ca 0 e e e e e e e e e e e e e e 153 57. Polarization for 8.34 MeV level of Ca”0 . . . 154 58. Cross-Section for 8 MeV level of Ca’+0 . . . . 155 59. Cross-Section for 12 MeV level of Cauo . . . . 156 60. Cross-Section for 4.43 MeV level of 012 With 40 MeV e e e e e e e e e e e e e e e e 157 61. Cross-Section for 9.6 MeV level of 612 With 40 MeV e e e e e e e e e e e e e e e e 158 62. Cross-Section for 6 MeV level of 016 With “0 Nev e e e e e e e e e e e e e e e e 159 vii LIST OF TABLES Table Page 1. Optical Parameters . . . . . . . . . . . . . . 40 2. Central Absorption . . . . . . . . . . . . . . 42 3. Spin-orbit Integration . . . . . . . . . . . . 42 4. Effective Form Factors for C12 2*, T = 0 . . . 57 5. Parameters for the Distorted Wave . . . . . . . 57 O . . . 59 7. Effective Form Factors for 016 3', T = 0 . . . 59 6. Effective Form Factors for 012 3', T 80 Identification Of the Final States 0 e e e e e 63 viii LIST OF APPENDICES Appendix Page I. . . . . . . . . . . . . . . . . . . . . . . . 64 II. ....................... 69 III. . . . . . . . . . . . . . . . . . . . . . . . 71 IV. . . . . . . . . . . . . . . . . . . . . . . . 73 V. . . . . . . . . . . . . . . . . . . . . . . . 76 VI. . . . . . . . . . . . . . . . . . . . . . . . 89 VII. . . . . . . . . . . . . . . . . . . . . . . . 91 ix CHAPTER I INTRODUCTION The theory of the scattering of high energy nucleons by the nucleus as developed by Kern-n, hohanus and Thaler (1) (hereafter referred to as EMT), often called the distorted wave impulse approximation (or DWIA), has been very useful in the study of the nuclear reactions. In DNIA the incoming nucleon is considered to be scattered by an essentially free nucleon in the target nucleus while traversing an average (or Optical) potential due to the presence of other nucleons in the nucleus before and after the collision. The calcula- tion of the wave function (distorted wave) of the beam nucleon (as the optical potential is of complicated functional form) has to be carried out numerically using a high-speed computer. Since this procedure is long and complicated, it is difficult to keep the essential physics in sight. There- fore it is hoped that the calculation of the distorted wave can be simplified by making further approximations and.there- by bringing out the essential features of the nuclear re- actions. The Eikonal or VKB method is used for such purpose. (Several authors have applied the HEB method to nuclear reactions with high energy beam particles above 100 nev. Squires (2) used WEB to calculate the cross section and -1- -2- polarization of the inelastically scattered nucleons leaving the target 912 in 2+ state. Squires' optical potential was of Gaussian form and had no spin-orbit potential. The particle-hole interaction was not taken into account in the nuclear wave functions. Agreement with the existing data was good if an effective charge correction was made to the cross-section. Making use of HEB, Sanderson was reasonably successful in reproducing the broad peak in the cross sections observed at the excitation energy near 20 Kev for C12. (3) The optical potential Sanderson used was purely absorptive and had no spin-orbit part. Sanderson's nuclear wave functions were linear combinations of the particle-hole states. D. Jackson used WEB to study the scattering of a nucleon ‘with incoming energies of 40 Rev; 90 MeV'and 150 Rev from L16, exciting the target to 2.18 HeV’above the ground state. (4) The theoretical prediction was compared with the experi- mental crcss section for a beam energy of 40 wev. The experimental cross-section was greater than the theoretical prediction by a factor of 1.5 and peaked at smaller angles. This is not surprising as DHIA.and.HKB are high energy approxhaations. However, the polarization agreed with the experiment reasonably well. This is because the polarization for excited states of normal parity is essentially given by the Born approximation. D. Jackson also used a complex optical potential of the Gaussian form. She showed that the effect of the real part of the optical potential was very small at energies above 90 nev. T. Erickson calculated the -3- cross section for incoming nucleons of 180 nev exeiting the 016 nucleus to 2‘ state at 12.5 nev. He obtained good agree- ment with the experiment for the cross section although he was less successful with the polarization. The cptical po- tential used was purely absorptive and central. The nuclear wave functions Erickson used were combinations of particle- hole states. (5) There is now much more experimental information about the inelastic scattering of high energy protons (around 150 16, and c340. DeBouard et a1. (6) at Orsay new from (:12, 0 measured the polarization of inelastically scattered nucleons from 012. Jacmart et a1. (7) at Orsay published results on the inelastic cross sections of the light nuclei. More re- cently, Hasselgren et a1. (8) measured a large number of inelastic cross sections again from the light nuclei. Boos (9) measured a few scattering cross sections from Geno. Looking at existing theoretical calculations by the VIP method, one is impressed with its reasonable success at high energy. The present investigation applies the WEB method to nuclear reactions involving an inelastically scattered nucleon with an incident energy of 156 HeV'and.many excited states of the nuclei, 012, 016, and c340. The optical potential used has a.flood-Saxen form and a spin-orbit part as given by Haybron and Satchler from analysis of elastic scattering. (10) The nuclear wave functions are taken from calculations of Gillet et a1. (11) Cross sections and polarizations are com- pared with experiment and also with the results of DUIA -4- calculations. (19) Particular attention is given to the effect of the spin-orbit potential on the polarization as, it is suspected that for some states, the spin-orbit term may be very important. The same calculations are done for the inelastic scattering of incident nucleons of 40 nev from 012 and 016. ‘As the use of the'HKB method is not entirely Justified at this low incident energy, one would be grati- fied to get qualitative agreement with the experiments. In Chapter II, the distorted wave formalism is out- lined. Expressions for the scattering cross-sections and polarizations are given. The definition of the cptical potential is also given, along with the definition of the scattering amplitude. Then follows the discussion of the impulse approximations. In Chapter III, the distorted wave is calculated by the WEB method. Chapter IV deals with the nuclear state functions in the particle-hole formalism. Form Factors are defined for spins S = O and S - 1. Further reduction of the Samatrix is carried out in the first part of Chapter‘V. .A typical integral that is in- volved is carried out. The most general expressions for the scattering amplitudes are given both for spin S a O and S = 1. In the second part of Chapter V, the data for the optical potentials are given. The results of the numerical calcula- tions of the distorted waves are shown. In Chapter VI, the results are discussed and compared -5- with recent experiments and also with DWIA calculations. WEB is applied to the incoming energy of 40 HeV’in Chapter VII. The main features of the calculations are the same as for 156 HeV except that the two-body interaction is of the Iukawa type. The numerical work involved has been carried out again with a computer. The conclusions are drawn in Chapter VII. CHAPTER II DI STORTED WAVE THEORY Cross Sections and Polarizations Assume that the Hamiltonian H of the system of a nu- cleon and a nucleus can be separated into two parts: H=HO+V X‘ where Ho =- Hn «Ivfiand V . 12:1 WEFj-rza ). The symbols have the following meanings: 'fi is the kinetic energy operator of the incident nucleon. fin is the Hamiltonian of the target nucleus. 7", 5"" are the position vector and the spin operator, respectively, of the incident nucleon. E, f are the position vector and the spin operator of the ith nucleon in the nucleus. X is the total number of the nucleons in the target. V (R, 5’33, if ) is the interaction cperatcr between th nucleon in the target. the incident nucleon and i Let En have the iegenfunctions (£af) (2.3) corresponding to outgoing spherical wave. The asymptotic form is 4?? -‘ K V" :K‘r e' e' gsne +£PI§) .3 (E94 4:1“) + 50—? Q“ U + SAC“ \" 41“”) “v (2.4) where kn2 = k02 - Zmnh and summation over n is to be carried -8- out for all possible excited states of the nucleus. The coefficients 8 and Sn respectively, are called the elastic o, and inelastic scattering amplitudes and are to be calculated from (2.3) and (2.4). One gets in the center-of-mass system of the nucleon- nucleus, 2 sn . -(211) gaié 6%) (n, kn) le°,o) (2.5) 1 1:0 and kn are the wave numbers of the free particles before and after the collision. (6) represents the ground state of the target nucleus. Since we are concerned with closed shell nuclei, the ground states have the total angular momentum J I O and isotopic spin T a O. n is a set of radial quantum number, J, T, and projection of J,)a, for the excited state. Since we will be concerned with a specific final state one at a time, only )Awill be kept in writing Sn as 89A). 89*) is an operator in the spin space of the beam and hence can be expanded as 39.) - 8°91.) x 1 4» 3‘3“»); 4» s’gufl'y + 82y"; (2.7) where 1, Vi, Cy'and. {2 are the unit and Pauli matrices. The cross section for the nucleon with any spin state after the scattering of an initially unpclarized nucleon against the target nucleus is Ar 1' 1?: "" 1’ §§.§|? Us. 3”: is a spin-orbit opera- tor acting on the incoming particle. (’13 the reduced.mass and 1% I c I 1. Using Green's function, one can write 55°? 4K. P-F' XS " €79); " 2‘31; 8%) l [ U‘CF)+U3(H)?':1XS:G’)a-rw (3.2) where U», the spin wave function of the beam, is suppressed. Vith.thauley and.Brown (12) and Glauber (13), we write :Z-? X "” - ' (1') C k° )( (2"54 (3.3) X'(r) is an operator in the spin space and has to be deter- mined by (3.2) and (3.3). Assume that the potential is very -16- -17- msooth and varies very little within a distance d and the incident energy is sufficiently high so that kod )) 1. Then it is reasonable to expect that x' (‘1‘)-U varies very little in d. we shall drop the terms of the order (53:3). From (3.3) and ($2), one gets : ew- ) . ,- X'(?) '3 I " S e " r[Uc('J) +U U‘(yb)r? e-z .F'X; (?) 91?, 41‘ [r 4"] (3.4) One gets from (3.4) eKo'IRWI Ea, (r1? 0 -'n X‘V)‘ ‘ - _%S_e___ lr-V'I OUeCr'W‘F'M' .‘KJFZ-W) __, a __ 42’ e ‘o. KO. (r-v9 . VI ' A 4,. ”,4," e. Uswfifi «02(th (3.5) Changing the variable 35- - 19.2" in the right-hand side of (3.5) and using di’I r2 dr 01d} 21f . c - ( «.m- , .. X4” 2! - it 8 g g e ’1) uc((?-1="|)X_ (. 4"") "”1448" 411 r)! O -I 0 ” 2“ .W. ‘i LJ’I a-fin . _ I]; '-II II; I' 4.“ S S g§7_ US (|r~r 0717!?) KX‘PP)Y' Jr 414? o -n o (3.6) Consider the second term of (3.6). Integration by -18- parts in )l yields f8 Jail-h, x(' ‘9”) Ar" 1-{1R'.Sew U cufl- 4-”9X ””11 ° = --t «3(- , +§2°Sc r ! n)-§L;((ch)°)14V" (3.?) Because of the rapidly varying phase, the second and third terms are (HE-:3) compared to the first. (13) Hence they are dropped. One could apply the same argument to the second term of (3.6). One gets X1?) = ‘ + 7&8 WHEN-W) KHZ-WNW] i=1 + if: 8 USU-P4”) XXV-V”) r. (F'J-"QXK dr'] 0 ’11" (3.8) Now taking our coordinate system such that k0 is along the z direction, TI cosy is measured from the z direction. X'Um = . + i—S-g u‘(k,z-z~))('(?,z-e") ole" + LE- 8 Us ()3, 3‘2” 6’. (PX?) XXI.) E‘t”)0)2" ° (3-9) -19- where b .J x2472. Hereafter, whenever convenient, we shall use the cylindrical coordinate system as defined by r’ - (x,y,z) - (VJ). If the particle is incident along 2, then b is the impact parameter. 2 X = ' "if-8 [ 1145,29 + (1,“,291afx'xilx (1,2948 -v0 (3.10) One can rewrite (3.10) as e _. . o -:‘_E S [ uctm') + 11,1529 r3375] alt X (L2) = 6 Kb -70 (3.11) Combining (3.11) and (3.3). one finds the solution to (3.1) 8 7...; _, :5. S [ uccu') + u,c1,zua’.'¢x'l??l de' Xt") : Q. ° —N k. £2,197; (3.12) To calculate xx“), one must solve 2. {-1 t) [ ‘11: + Life) + u:?o?]X. 35X: (3.13) with the incoming plane wave of the wave number k and the incoming spherical wave. The procedure is exactly the some as before except this time il- -1 term survives. -20.. 3E5, + ii. a. At” ._. .3. K 8 [ “5 (5,29 + uf(s,z')?.t’x?14%' @1054- '3 (3.1a) The scattering matrix (2.5) is now, with (2.37), (3.12) and (3.14): so» ”(131%) 81531;.) [:14 pupae-29] {n K,“ W £3,911,112.“ (3.15) CHAPTER IV FORM FACTORS Nuclear States The nuclear wave functions (bf and O. that appear in (3.15) will be described in the language of the second quantization. Let a1 and a be the creation and annihilation operators of the fermions, i.e. the nucleons. a is the ad- Joint of a) . aJatd'atat-s s,t a8 at + at a8 = O a; a; + a; a; =- 0 ((4.1) Let lo) be the "vacuum“ state (closed shell state). Then 33,10) represents a state of the closed shell plus a particle with the angularwmomentum J and its projection.m. (-1)J+naJ-mW57 is a closed shell state minus a particle with the angular momentum J and the magnetic quantum -m. The effect of this missing particle on the shell is that as a whole the shell now has quantum numbers (3, m), which we call the "hole” state. The phase (_1)1flm is necessary to give the hole state the same rotational transformation property as the particle state. (16, 17) We confine ourselves to nuclear reactions in which a particle makes the transition from a closed shell state to a higher state. The particle-hole states were used as the -21- -22- basis to calculate the nuclear wave function by the pertur- bation technique, the perturbation being the interaction between the particle and the hole. Then the nuclear state is a linear combination of the particle-hole states. ‘A particle-hole state q“ with a total angular momentum J, its projection )& and.the total isotopic spin T is given below. (5) 2 .Al ’ 1‘ R” S» 3“ ‘9‘ £1,1uL5). . ,0. M. " Lawn: I!” 5" 3n 's’ H" ‘1'“) L S T I I . 1 0‘, * I. <1» 1.1,>\u,>\nlL. m H) ” (1" . , N)“ I , xul'xu; “V QAUI'A”, “J ‘0) 1 \ , ‘ sum, * i. “'0. 5», mu, m" ‘3,“‘2 )k'" 0t: arm. \0) mm; “W” "’ 13+ ; x ' ' -\ 1. CE 1.: 1W, [v.52 \ T, o) U atfiitfl‘ottéfl'; \ o) (11.2) where primed and unprimed variables refer to the hole and the particle respectively and f. =- {3171 '5". ‘QN’ “N and I N are the total angular momentum, the orbital angular’momentum, the spin and the isotopic spun of the particle respectively. nu is the radial quantum number. The corresponding primed quantities have the similar*meanings for the hole. -23- L and 141 are the sum of the orbital angular momenta and its projection of the particle-hole state, while 8 and H2 refer to the total spin and its projection. The quantity{ } is Wigner's ‘(j symbol and <\ ? is the Olebsh-Gordan co- efficient. (18) The nuclear wave functions ()0 and 4“ are given as in - to? Q‘ = E. (1‘90" Cf" (11.3) For the meaning of x and I, see the last paragraph of this Chapters *- The factor Xi) E’t‘ X: is to be replaced by EX K SEXE’*t X13: £4,415 a: (1,4) 4,4! (Mb) where t is any one of ti's and in, and Q”, are the eigen- functions of a single particle in the harmonic oscillator well. The scattering matrix (3.15) now becomes (9* Q1 3 (1*) = 21%. Q???) 2;,me ail (M ,3.) Pka ’ch. L“) t (1,, 01,, \o)\ I.) (11.5) where [to and {1}) are the initial and final isotopic spin states of the beam particle. -2h- Isotopic Spin Dependence The two-body scattering amplitude has the most general expression in the isotopic spin space, t :- ta + t' {-11 (M6) 1', I? t8 and t' are defined in (2.35). As we exclude the charge exchange scattering from our considerations and our targets have T . a before the scattering, the projection of the isospin after the scattering again will be zero. Sur- viving terms will either be t8 or tv depending on the final states of the nucleus. When T a O, the operator t becomes {éts' When i - 1, ~ - t - J'étv. (11.?) Form Factors Carrying out the algebra involving the creation and annihilation operators, (#.5) becomes ’9" " 2E ( ... gums“. (“'08) where Q {— :6,» Lg $5.53» L * * Ln...2~,>\..l mix, a) (4.9) where ‘1‘", Luke» and (“'2’“) 9"”) are now the eigen- functions in the harmonic oscillator well. Final state S 8 0. L 8 J with (2.33), one may write 3.) u A A .L . 1 i T» = l j . L " 1. J" (,1)‘. ' ' E NJ.‘ )1 a 1i Nfi“ Z. (IMO My 0‘ TV»)? tr") (‘0’ (a, AN,“ I b)"‘) o I L: '<’e""‘ °) °'L' °>\‘:M= 1m. «tum. (ll.l3) and the tonal properties of the Clebsh-Gordan coefficients, one can deduce from (lull) a , A, . T; = 2 ~' 3‘ i”! 2” J2: J“ {J W ca: 12: at: (cm 1‘); O, 9‘ L: °> (A) I o ‘J' . * * 9* SKN,9.1YL7; Xk [A " “Exit: fi’NAJr-LAFA‘D‘ (n.1u) Define the fom factor FJOJ as 1’30" " 2 EWY’N fflfflf'w‘“ I" j“ 3" M {:5 ' 1' K (2,1,6, 0; ‘3‘ 3-,”) Kym)!» RN) 31‘ ) 3.1} I I [2, (1L“)(zlgi|)(z(,;+l)] >4. (b.15) (a (hie, 0; 0‘19) g 9" 3' 0 (0"- N)- ‘i". walnut-i = so (n.16) is called Vigner's 3-j symbol as given in reference 18. (£1.15) becomes where quantity ( A . ‘1; = 21. ' £11, Q» J:5. 3.. 4”; a? u :- 5; 0., 1.}, o,.\ L, .> W 3' o 'J' . * * 9* )KMWY‘V’ X“ [A * “517C: fimwfl’m (n.1n) Define the form factor FJOJ as w - 2 1(me in; me» a. 1. 3.. M W ‘9» 2. J“ *- x <2», e, o, .1 1,0) We”, RM. 2.: I in} T l Lumuczwvueéwl’é (n.15) (a (43,“, 0; 0‘1"») 9.: I O (~4- N" i". I e 1.4.. +111“): .1 (.4) (n.16) is called Higner's 3-j symbol as given in reference 18. (huls) becomes where quantity ( -27- OJ:- L¥+ )JWJ” 2 NJ I"J ‘1— (‘1')“6 3%,: (2"; (ARI): ”)1” “Q (' (n.17) (MB) is simplified as JoJ * "' s(/u. s-o) .. 2({(%))’ Y1» XE) [Ai 031%: “iv-ML (4.18) PinalBtateS-l J-L Algebras involving the spins of the particle-hole states are more tedious than the 8 - 0 case. Writing out explicitly the spin operators of t, o x y 2 t-t1+to'x+to~}+trz (M19) with t° =1 4» fly 13"! ’ - c +-s§y t anz where (1's are the spin operators for the particle-hole and 6"s for the incident nucleons. The coordinate system is defined in Chapter II. A typical calculation goes as follows: dfim‘c 5‘ l M)($ £3“: :1, a, New. S t an M1...) “S, PM) aw _ N i 1 _ ML MEI-4) (SI) S" I MI. “I. ‘ SI ”3-)(suj m”‘ M‘ S" I an.) U, u ‘b = g, [gnu + Shy-1) (b.20) -28.. where i =- 41, 02* . “—ggii‘i} £3 6;; «'03:: Using (n.20) and the like, (M9) becomes A A t g ‘Qfl S“ 3” Tu U‘) ’5')“ "'LS‘“ \ Z, (L, 3,91» (441,») " fl 943.; L- S T (4.21) where 0‘7 = ’t C (5mm + Shine!) + E (‘Mt4vsnudfi + $450,,“ + 5m») + 5F 5a,. 6; ((4.22) Remembering the identities (14.12) and (b.13), (“.21) can be simplified as .__ o 4‘, A A ‘9' (N '5» Ju IA») c4313" ("3‘1”); H) "J1 9,; 3": 3,3} l: X Rnfllefilfi Ct > £2 R191,“ 473’ (n.23) ,m : am: the a With -29- Define the form factor 1: {5. 4 A A A ' e ’3 " 35‘ T. WW). 3,, 3,; $1.. 3.; W2" ‘v‘ 3» h N 111 Se‘ 3,; T S I 1* Res, Km: (4.24) making use of the properties of 3-j and 9-j symbols listed in the appendix of Reference 18, one can reduce (n.24) to 1: 4| ‘0 . . ‘ FJ = E (K+Y)“ Ede” J“ 3‘ )0! j“ I R“. a N W J. J .4 11.3., 7- a 1112.; (ii-25) with (4.23) and (11.25), (4.8) can be written L." = , ‘= 3( 1,5 1 ») 24%. ('4)£m «Amman,» 1 ‘SFI‘ Y:XS’ X( “n" (b.30) .Although we have assumed that the ground state of the nucleus as the Hartree-Fock ground state, in (h.3) allowances for the correlations in the ground states were made by the coefficients Y. Gillet et a1. (11) have allowed the -31- ground state of the nucleus to have the excitations of the particle-hole pairs. Then a nucleus can be excited in two ways: first, by creating a particle-hole pair and secondly, by destroying a particle-hole pair that is present in the ground state. X is the amplitude of the first mechanism and I is the amplitude of the second mechanism. These are given in References 11 and 12. X and I satisfy the normalization condition 2 - Z (x 22)" - 1 where summation is over all the particle-hole states that contribute to our’nuclear state function. In evaluating the form factors, the corrections to the phase of (Xe!) should be made by multiplying (-l)JN . (19) All the relevant form factors are evaluated and listed in.Lppendix I along with the radial wave functions. CHAPTER V DETAILED CALCULATIONS Reduction of the Scattering Amplitudes Scatterin Am litude for S I 0 For the final state of the nucleus with L = J, the total scattering amplitude will be the sum of (M18) and (#.26).' First let us consider (hula). with (3.12) and (3.1h) B(L=J, 3-0.1“) ' Zflfl‘ij) 8 FM ‘1’1b flaw-KW o \‘O LH -'" ?u H) "IUJH’ -58! c sr'(l‘x 3455 S2016 U‘O'JPXEHJZ' e '3 ° "° [A 1 C63] (5.1) To evaluate the exponents with the optical potential, we use the coordinate system defined in Chapter II in which i; is along the 2 component of vector '1'. we further make the following approximations: i. 2 i; “mi '22 (5.2) The basis of the first part of (5.2) is that the deflection of the particle after scattering is roughly approximated by é‘m‘m‘? and t (d). The second approximation of (5.2) is -32- -33- based on the fact that the energy loss of the beam is small compared to its incident energy. Let I K} Q. ' ‘3ng u,n., g')dz‘ -o~ - b t N ‘ Q‘ "$733 0.0.20 A: '% UCLI.)d2‘ F‘C 5’8» c 3 we Q .3 Qt + Q =21; 2. IE, Usflei') d2' ‘9‘ (5.3) Then (5.1) reduced to x a"? SHIP-T. 8'09)” ' 2E. 6%)! \(LH FJOJ e 1 Nb) 6:0‘0—‘(tm [A + ca'y] é:e.c-.C$XK.) a? (5.1;) A A - ..a cy-e where b, to are the unit vectors of b,'§b, and.q a k-ko. Let é 6'; e, . G; (,0; (Qfiaz) ‘3 «Rm 4?“ (Qfl‘Qz) + i- [Aa mac.) - at. (61.-62.)] [6; r...) +§ {-cosmaa.) + CoSLQer)] a}, [431m] (5-5) -34- Considering Q1, Q2, and Q1 + Q2 to be small, (5.5) becomes 4ch- ".Q°— . e MW e ‘m=fi-:tha.ma+$[(¢*°m~(Qr°‘=’]tfi.r~] Manama 4:71-61 Ema-m] (5. 7) )l Us 42‘ is dropped for convenience. (See 30 2 :ob2 where Q1" Q2 - Appendix II) With (5. ‘7), (5.1+) becomes * 3(L=J, sac, ) =- 211:) M)??? PP YIM‘W) FJwtawr’w? 4&3- (€72) é:- (gtp 17-? ['(b) I,JoJ Qct)‘fi-:.(0,Q)¢ Firm} .5? -zlégk’zvia L 8 53'? ("5)pr Q (L) Yr; 0;“ [A + ‘63] d? (5.8) where 6;: r A...”- QC”? Expanding 8(W, 8-0,”) in the spin-space, as 8(L-J, 8-0,») - 8°(L-J’, 3-0,“) 1+s‘(L-J, s=o,u).—x + syn: , s=o,,u)o- y +sz(L-J. M. )r F 2 (5.9) He get 8°(L-J'. 3.0,») . 21?; (71C) Ae-‘S 1.?[700 YT: (,0?) PJ’OJ’ d? +28IE-(MC8631rP(H {”QCL) Him?) cos? dr s‘u-J. 3-0.») - -2 Pr (T’gxMSé-fi F1113” 01m ‘(wimemQ dr shy-J, s=o,») . 2E; (‘15.ch '5'? ['er TI}. (94) a? -35- + 215—34 (7’5") g e-WVFCB) FJOJQ fling cosc) d? sz(L=-J, 3-0,») =- o (5.10) The integral over (b is carried out below: 1(- _ x~ -» flush?) — YT,» (9,0) 6 + 17'? ‘1)”an 60¢ Using the formula (20) ‘ 8 m : 2 ca}: 73"” E, ) = 2 L o cab” 0‘» I‘M“ (5.11) (2) J being the Bessel function of order m, we have M gl‘é.7'?e1.fl4 A§ = 2W ‘2‘)“ 1")“ (1"431‘9) ° (5.12) a.“ . . -. ) 945’? 6‘») “44¢ = W (*1 w NJMI‘M'MMH iw‘Iya-Jr‘m”) 0 S1“ .39.? -'»§ (5013) -. ‘ Tn d. a g “in“ " I .:. ' I“) o A ) Q “1"“ Jun?” n0) ‘J thflmw] (5.11:) Let us look at the integrand of (5.8). Pi” is Q'drz multiplied by a polynomial in r of even or odd parity as given in Appendix I. We shall approximate P and Q by the functions of the following type. (See next section) 2 2 (5.15) 2 2 Q“) " 6°33" “MC“ 4' 05b3) -31) +(DFb + Dsb3)e'sb] (5.16) Then all the integral can be carried out analytically. The integral of (5.8) along Z is the following type: (21) N -at‘ . .-« (an-0 2“€. =‘3 11 g o\£- 2"“ a.“ E o (5.17) A typical integral in (5.8) along b is given below: (22) 9° 1. -| 0 I. 1! £5 1.-1— ” -. 1 “1* 1X" (”'9’”) e. W (F. [é'éfl 3m); .11. ) 2v Ldfp)»; PUT”) 4 (0H?) (5.18) where (F. (“In 2) = 9i (3),. i“ “=0 7". (f)n m°.i Q‘Lfi AWOL) "" UL+n-n (5331 (f), =§U+§0 (gym) (5-19) -37- and. 'F(1+m) = 10 ,F. is called the generalized hypergeometric function and in our case always a polynomial of the finite degrees. Scattering Amplitude for S =- 1 Following exactly the same procedure as before, we have, using 0;,- (0‘“ sin+- dices“, ”za‘f‘“ -{ Qtrm 3. c; e. = [6“ ~§Q4InQJ -:Qtrh ‘:Q\o'm e “S ’— = L ‘3 t WW4] ~JQea-M JAG" rt 2. m -= 6‘E (5.20) substituting (5.20) into (4.26), we have after integrating over Q , 8°(L.S=1.}\) ° kgk?) 31c ”FHKIHE" + JM\) e” n 3)“) le& *- _, 3 .., 8 Mam." 20")? Ag?) erfg (P) K (it) XSWW’W' U) N a) U ‘A .2 2. e: "5 1 V = 173-— SW?) +£V _g'(*.w1 may be expanded using date: N -————_ - 09 ITF-P'l '1 go (118)} WK)?» Wm) B (3%") fl . *(A‘f'(r gfl‘ZMp-QR HIGHS “‘11 ) ') (7.3) [so -58- where 3( If V3.) and h+( ‘66) are the spherical Bessel function and Hankel function of the first kind, respectively, and are given by ‘ flier 3t m ._.. “F I 31 25"- w c. Rt ‘" ‘ (R: * :82) .3— r 4 Re ‘\’ 3 3&2 2:; A- M r‘S z‘sl (1-5)! (7.8) The arguments of J( :fr‘ ) and h+( “("3 ). r, and r<, refer to larger and smaller of lengths (r, r'). (25) Using the identities (8.12) and (8.13), the ortho- gonality of IQ , m and the definition of the form factors given in Chapter IV, we get t 0]" ’ 391) = 2a (35‘. 4‘;\X:’*Y L“ *‘I‘M aft (fr) 803! “VHF: r 4,- ~ (>0 Q) ' ‘ 3.] L ' ‘8' Va )QUQr) 8'. £{ (If?) F (Y0) r] A? ‘1’ LU1&Q(CH 831LW6.9F103” . * ”I 3. W“ 8" i)" W) F‘" 9‘4"] 1.5"") “- P (7.6) -55- Distorted Wave As before, we have 90 ”1?- )5. S udz‘ -” 962%: = e‘" w (7.7) 12 are in the where the real and imaginary parts of U for C notation of (5.28), (28) UB - -V(l +e‘)‘1 ; v = 38.5 MeV. r0 = 1.22r a = 0.67r HI = -W(l +ex')-1 ; w = 8.9 MeV. r5 = 1.8f a'= 0.7: (7.8) Integral along Z is carried out numerically and the results are fitted to suitable functions of b, the impact parameter. The methods employed are exactly the same as in Chapter V. _ 85" d. e za_wUIz GAMCA(b) = = 1.0 - (CM 4' CNb2)e‘Ab2 _ (DM + DNb2)e-Bb2 (7.9) K. FEE“) = agURdz' = 38-5 (0“ + CWDZM’A"DZ + 38.5 (UM + DNb2)e'Bb2 (7.10) 1:-” 1:” 3 e—z‘i-‘f- (Oos (FEE) - £sin(FRE)) x GAMCA ° (7.11) where b = r sine. Determination of V3, VI 9 and f ' (A rough estimate for the constants of the Iukawa po- tential is made by calculating the free two-particle scattering amplitudes in the Born approximation in the two- body center of mass system and comparing the result with -56- the coefficient A of the two-body scattering amplitude. Be- membering that the interaction is complex, Mq) - AB 4- iAI(q) -fr __' =-.(£21L)_§m(k\vfi ° +1v1e 9’ ‘k? 1‘ r m V V 8‘?q_2+—1€Z - in)" q 2.5.2 (7.12) From EMT, we have values of A(q) Ea _ i; q = 0 .78 fermi q = 0.0 .86 fermi a 1.1 .39 fermi = 1.8? .83 fermi Equating'x(q) to A's for two values of q's, we get ya . - .217 r1 vI - - .78 r - 101 f f. a 1067 Effective Form Factor For a given state, one can evaluate numerically the ‘111al.'11::).‘l:iezH Y n I A ‘ . 3° FRJOJ a Re Ltd} ‘1‘“ hi) FIOI'.‘ 1.". 4,3“ (:cfl 8te(;frc)F P L‘V" ' r (6.13) A Q) .I I'. ,. It} . ,1 3°12. 1'1"” - ’8. W) 30 w r) F 91-1.. + W“ {81er "(284“ .1 as the functions of r and the results are fitted to the linear combinations of Gaussians multiplied by polynomials. ‘Again the numerical methods are the same as those in Chapter V. s (p) - 2&[§r)fltflm XkeCFRB-i Si-LFR91[VK$:°3+WI’]¥‘1] -57- 1350.0)“ (“1") . GAMCA(b)r2dr sinfi «10 (6.15) 91§_2+. T a 0 at 8.8 MeV J2(1fr) = t [?l_+___ ____}'[. f 1‘ ...S’ 1‘} + 53;. [e"r+efr] (6.16) héfiufr) =1 [—1.+ yr +P3‘T] .4" (6.17) 2 FJ°J(r') -.A1’r'2e '°(r' (See Appendix I) The results of integrations over r' are fitted to the functions of the form 2 2 11 - rzch .“AL r 4.03 e‘AH r ) (6.18) “ 202 ’ 202 The constants CL, CB, AL, and.AM for F3 and PI are given below: rsts h.--Effective Form Factors for 012 2*, r - 0 CA as AL AM A 33202 -.116 -.057 .35 .20 ‘9 202 -.065 -.018 .35 .21 I For FRE(b), and GAHCA(b), the coefficients are as follows: ILBLE 5.--Parameters for the Distorted Wave CH ON (A UK DN B FRE(b) .129 -.0031 .12 -.032 -.00#8 .54 GLMCA(b) 1.000 -.0153 .12 -.0580 -.050# .29 -58- Jz(r) is evaluated using the polynomial approximations to JO and.J1 (see Appendix 6) and the relation (r) g JN(r) 2N r The Fortran program for IBM 1620 is given in Appendix 7. The result is plotted in Figure 60 along with the experimental points. (29) It is gratifying to note that, despite drastic approximations and validity of the WKB in doubt at this energy region, the curve shows a qualitative agreement with the experiments. The dotted line is the result of local, impulse, spin-independent approximation, i.e., exactly the same as at 156 Nov except that B, C, E, P of t(q) were set to zero. 012 3‘. T . 0 at 9.7 adv .All the necessary informations are contained in C12 2', T =- 0 case except :3“? r) and h“;(i fr) and the effective form factors: - L 33(1)”) = 1)) F (€19)ng -f". -(+( 6%:— )) h(+ ) 8 C 15 |s 2:) (ifr) [__?" + ———--W_)3 H + 0’0" V A (A 33303 and F1303 are fitted to 2 2 (CA r3 e‘ALr + on :3 e'AMr ). The constants are listed in the following table. -59- TABLE 6.--Effective Form Factors for 012 3', T = 0 ca 03 AL AM A 33303 -.110 -.031 .35 .2 [$1303 —.063 -.oo86 .32 .2 With 33 from equation (6.19), one can integrate along Z analytically but along b, the numerical integration is per- formed. The result is shown in Figure 61 along with the data. (29) Again the results look reasonable. 016 3’-gg - 0 at 6.15 ncv Calculation is identical with 012 3‘, T = 0 except that the effective form factors have different constants. TABLE 7.--Effective Form Factors for 016 3‘, T = 0 oi 03 ‘AL AM A 33303 -.0888 -.0698 .32 .20 A 21303 -.0595 -.0182 .30 .20 The results are shown in Figure 62. There are no experimental data available to us. CHAPTER'VIII CONCLUSION 1 6 MeV The predictions of the cross-sections by the WKB method show reasonable agreement with the experiments. Our predictions of the cross-sections also compare very favorably ‘with the DHIA results. The effects of the spin-orbit terms on the cross-sections are found to be small. Also, we have found that the Born approximations give essentially the same angular distributions as the distorted wave predictions ex- cept that the former gives cross-sections which are a few tunes larger than those given by the distorted wave predic- tions, a conclusion reached by the DWIA. (19) The WEB appears to predict consistently larger values of the cross- sections than the DHIA does. The reason for this is not evident as the precise comparison between the “KB and the DHIA is not possible because of different approximations made in.algebraic work. He may change our magnitude a little by correcting for the notion of the center of the mass of the nucleus as in our calculations we have assumed that each nucleon is in an orbit of a central potential. Also, we be- lieve that better nuclear wave functions would also change the magnitudes. On the whole, the WEB method as a theoretical -60- -61- tool for the prediction of the nuclear cross-sections is comparable to the DHIA. For the final states in which the contributions of the 8 - 1 states to the cross sections are small, the polarizations predicted by the WEB agree with the results of the DHIA. The predictions by both the WEB and the DWIA agree with the experiments except at the small angles where the theoretical values are too large. (Figure 2) This feature seems to be common among the calculations that use the impulse approximations. Addition of the L's term in the optical potential makes the situation worse. For the final states where the S 8 1 contributions to the cross-sections are important, our predictions of the polarizations are quite irregular. In some cases like 1*, T = l of 012 at 151 HeV’(Figure 8) the L08 term merely enhances the Born approximations. The spinporbit term changes the curve in the right direction. In other cases like 2", r = 0 of c:12 at 18.2 uev (Figure 12) the changes brought about by the L's term are quite radical. We cannot say that the L°S term improves our prediction over the Born approximations, but we can say that the L's term should not be ignored in the calculations of the polariza-‘ tions as Perrain and.Vinh4Mau did. (Also we have found that, at least for 3' of 0a“, the contributions of the imaginary part of the spin-orbit potential to the polarizations are negligible. Also for 3" ,of Ca“, we have found that the wild interference pattern observed in the DWIA calculations (19) -62- disappear as we improve the fitting of the numerical integral along Z of U3(L°S) to a Gaussian function multiplied by the polynomials. This is another indication that the polariza- tions are sensitive to the spin-orbit potential. .As much as the polarizations are very sensitive to the L°8 term, the sensible thing to do is to take the polari- zation data of the inelastic scattering and adjust the L-S part of the optical potential to fit the data. On the basis of our calculations, we have made an attempt to identify some of the states observed in the exp periments. The results are given in Table 8. However, it should be remarked that as many as six peaks are observed near the excitation energy of 20 nev of C12 , our identifica- tions may change when further studies are done on these peaks. #0 uev Despite the drastic approximations involved, we re- produced roughly the experimental situations. When we used the Iukawa two-body potential in place of the impulse approxhnations, we improved the predictions considerably. Our calculations show that although the WEB in its present form is inadequate at 80 nev, it may be possible to improve on the "KB at this energy. -53- TABLE 8.--Identification of the Final States I r L Exp. State Theoret. State Comment (Gillet et a1.) C12 “.4 Nov . 2*, T = 0 at 8.8 Mev 9.7 ' . 3‘, T = 0 ' 12.8 " 12.7 " . 1*, T - 0 ' 18.0 " . . . Poor 15.1 ~ . 1*, T = 1 ~ 16.6 - 16.1 n . 2*, T = 1 v 16.3 " 18.2 ” . 2', T = 0 ' 16.0 ” 19.3 ” . 2‘, T = l ' 19.3 ” . . . Poor 21.0 ~ . 3', T = 1 ' 23.5 " 22.3 ' . 1', T = 1 ' 21.5 " 016 6.15 ' . 3', T a 0 ' 6.25 ” 11.5 ' . 2', T 8 0 ' 10.5 ” 13.1 ' . 2', T = 1 ” 13.0 " 15.3 ” . 2', T 8 0 ' 10.6 ” 18.7 ” . 3', T a 0 ” 15.1 ” 20.2 ' . 2', T 8 0 ” 19.1 ' Ca“0 3.? ' 3‘ at 3.88 ' 4.8 ” 5' ' 8.38 ' APPENDIX I The radial wave functions used in evaluating the form factors are: (33) a 4A 34 2 +1. 15 Q _a(\~l “H & +4 8' r{ 2¥fi5 1e-:?” = u' oL41 ——- - 32/“ (Trgfitx [ 2. «r] 334 a: K'yfl'xa/4 re[ QWU‘Q')” (24+S')°‘rl+dl)‘4 8.: (2&1; H The values of O( for C12, ()16 and Calm are taken from the analysis of the electron scattering experiments: (38) 012 ..... .37 fm'z 016 ..... .311 Cauo ----- .22 Using the definitions of the form factors (8.17), (8.28), and (8.29), we get the following results: C12 1‘, T . 1 p101 . -0.2250(2 c-Krz [Tl r + 22 0Lr_3_7 F111 - .159o(2 e" (121-El r + 112 K12] E Y1 12 H]. 32 1707 “CV 8.59 -2e7 3.28 -2017 21.5 .678 -2. 77 .682 1.38 _‘ -68- '0 .-l -65- 012 1+ 2" 2 F011 = 0.159 K(3/2)c" Kr [21. + mxr + mcfr" 9211 - 0.159 K(5/2)e" '6er r2 + YBeriV T = 0 E YL _3QL_ IN IA YB 18.0 MeV -0.885 2.38 0.53 -1.58 0.167 T a 1 16.6 MeV -0.137 2.6 0.336 -1.068 0.083 012 2- F112 =- 0.159t(2 e" °“PRAYl r + Y20(r_3_7 F312 - 0.159713 1%" “1‘2 r3 T = 1 E n .2. 423.. 13.2 HeV -5.0 2.36 -0.256 19.3 -2.89 3.29 0.685 23.2 -0.312 1.51 -1.085 2.2 15.6 MeV 2.86 0 0.78 16 -5.08 8.09 0.398 21.2 -0.188 -0.97 1.57 c:— ufa - -66- 012 2+ 2 F202 = -0.225°k(5/2)e"<1‘ [h r2 + Y20( r37 F212 - 0.1590L(5/2)e-°’~1‘2[§1 r2 + 112 0337 T a 0 E 11 12 El 32 8.8 MeV 5.52 -0.183 -3.536 0.665 19.2 -2.011 1.60 0.195 0.535 T = 1 16.3 ucv 1.98 -0.027 -2.68 -0.083 c12 3- F303 = FORM 0(3 r3e" °(r2 F313 = FACTORxB r3 e" '02 T a 0 E -EQ§!_ 229228 12.8 Mev -0.585 0.126 19.5 0.2 -0.318 T‘s 1 18.8 MeV -0.306 -0.067 0.39 -0.318 23.5 0 ° 1-, T = 1 F101 2 .. -0.225 of c'rxrz [h r + 130(127 Bl HZ F111 = 0.159002 e" 0(r [fil r + 320L127 E 11 12 1305 HOV -3e32 2e175 8.56 -2.85 e.— : an; and \ -67- o16 2' 2 F112 a 0.1590(2 e"°(r [Y1 r + 220(r_3_7 2 F312 = 0.15901 313.12?“r Y3 T = 0 E ._.-11.. .__;!§_ ._-Zl__ 10.5 MeV 0.0056 1.72 -0.369 18.6 0.0056 -0.989 1.78 16.6 -0.068 2.225 1.78 17.3 -5.68 3.72 -0.0219 T = 1 13.0 ncv 0.38 1.72 -0.875 17.6 . -l.l9 0.578 1.96 19.1 2.88 0.08 1.08 20.2 -8.88 8.38 0.62 016 3- 12303 :- -0.387,<3 r3 c-sz n F313 = +0.2680(3 r3 c" 4’2 1:2 T - 0 E Y1 (._Z§__ 6.25 ucv -1.93 .839 15.1 1.815 .519 20.1 - .621 -l.268 T = 1 12.7 nev -0.858 1.18 18.5 0.822 -0.226 28.1 -1.06 -1.18 = I. .3. 2 9; -68.. Ca80 3- #fi .303 = - roe-2 [a .3 + 12.1.27 F313 = fl 1‘;_°(r2 Ail r3 + 32er7 811' T - 0 3 Y1 12 31 32 3.88 Mev 8.95 -3.83 -1.775 1.309 7.15 -2.795 1.123 2.828 -0.866 7.73 1.59 -0.872 -2.19 0.88 8.38 -0.1 -0.385 1.81 -0.85 T a 1 3.88 MeV -0.07 0.088 -0.1 0.025 7.15 0.399 -o.058 -0.885 -0.505 7.73 0.223 0.098 -0.118 -0.357 8.38 0.378 -0.078 -0.92 0.1 08180 5- 1,505 . _ $16.2 x8 15 a. air-2 ('2' 1! F515 = 9,569 of r5 e" “1'2 12 81? T a 0 T = 1 ___ .s 11 12 II 12 8.38 MeV 2.163 -1.92 -0.058 -0.118 8.0 -0.232 -0.288 -o.822 2.657 12.2 0.787 0.212 -0.19 0.303 13.8 0.22 0.0728 0.628 -0.989 13.2 0.98 2.888 -0.161 -0.253 §Q«5 -0.13 -0.355 -1.138 -2.82 APPENDIX II The basis of this approximation is the experimental observation that the polarization of an initially unpolarized nucleon and the asymmetry (to be defined below) of a 100% polarized nucleon are very nearly the same. (31,32) We shall take the xz plane as the scattering plane. Asymmetry is defined as follows: Assume that the incident nucleon has a polarization vector E and the target has zero spin. The cross-section at an angle 9 is (15) i - + “ 3.3;”) =;§;1( a m“) + (GB8S - anus) 2.2. (AV-15) {87. Then SII acrx'onBDP [A + ocy] + 1 G‘y-FBDN-w [A + 0 try] (217-16) We can follow the same procedure to evaluate the second term of (AV-1). 89581, 8:0) =- id 'SPAl + iC°W'FBDM +0"! A-w-FBDP + rue-3211 + now-FBDN) 5' (AV-17) For spin 8 = 1, we can show that the only non-zero tem is the coefficient of 0'2. 321412 a -21! {'21 F CON-1% ( 1,1,1,0\ 1,1) SYT(9,¢)2111(1-) ['(b)Jl(-qb)r2dr sin 9 d9 =- - . - El 32 >CFBZ+§-2.CFB8 2“ CON J38 F ((532007:- {a- (117-18) -79- Then the addition of (AV-17) and (AV-l8) gives the scattering amplitude when the projection quantum number IA = 1. For ’18 -l, we get similar results. We have to repeat the whOle process to get the scattering amplitude for )1 = 0. The program shown is for l“, T a l of 016. The pro- grams for the other states considered have similar structures. Read in the momentum transfers at Q(N). Then the real and imaginary parts of the two-body scattering amplitudes A, B, C, E and F are stored at AR, AI, BB, BI, CR, CI, EB, EI, PR and PI. The parameters for the distorted waves are read in by the statements 153 and 139. The statement 123 reads in ~(1, ‘{ 2, El and 82 for the form factor. NE and HI are the real and imaginary parts of the spin-orbit coupling constants. The results of the integrations performed by (5.18) are stored as the subfunctions FA8, --- FB8, --- T85, --- T09. Only these functions appear for all the states considered, although not all of them are used for a given state. The real parts of the scattering amplitudes are given the following'names: Be@°(l4 =31)] - SAVRl Re[§x( #:117 =- SAXRl Rafi“ )1 -1)_7 - 32131 BelEzgfit=lI7 = SAZRl 3918094 =0)_7 =- sumo 3.57 ( [1:017 - sumo Similar'names are given for the imaginary parts. The DO hogs fiffe appro CI‘OSE -80- loops are necessary to evaluate the cross-sections for the different values of the q's and also to consider the Born approximations by making CM=DM=CN=DN=O and WB:WI=0. The cross-section to be plotted is obtained by 10 x TCBOS(mb). -81- 238 LEE H PROGRAM SCATER DIMENSION Q(50)9 ARH(50)9AIH(50)9CRH(50)9CIH(50)9 1WRM(5)9 WIM(5) 9CME‘5)9 CNE‘519 DME(5)9 DNE(5)9AE(5)9 BE(5) 9 28RH(50)9BIH(50)9ERH(50)9EIH(50)9FRH(50)9FIH(50) COMMON P O 1- T=1 READ 1009 (0(N)9 N=1939) FORMAT(8F1006) READ 165.(ARH(N).AIH(N).CRH(N).CIH(N).N=1.39) FORMAT(4F1006) ' I READ 1679(BRH(N)9BIH(N)9ERH(N)9EIH(N)9FRH(N)9FIH(N)9N=1939) FORMAT(6F10.6) 2:000 P=O.311 SQP=$QRTF(P) CON=1095 pEK3-0098 READ1519 (WRM(N)9 N=192) READ 1519 (WIM(N)9 N=192) FORMAT(2F1005) READ 1609CF9CS9DF90$9R9$ FORMAT(6F1005) READ 1109(CME(N)9CNE(N)9DME(N)9 DNE(N)9AE(N)OBE(N)9N=192) FORMAT(6F10.5) ’ DO 951 JF=192 READ 1019 Y19 Y29 R19 R2 1 FORMAT(4F10.5) YA=-.225*P**2*Y1 YB=-.225*P**3*Y2 RA=.159*P**2*R1 RB=0159*P**3#R2 PRINT 1249 Y19 Y29 R19 R2 F0RMATt/5X.4F15.3) DO 950 L=192 CM=CME(L) CN=CNE(L) DM=DME(L) DN=DNE(L) A=AE(L) 8=BE(L) pRINT IBSQCMQCN’DM’DN’A’B FORMAT(6F10.5) ' DO 910 J=192 WR=WRM(J) WI=WIM(J) PRINT 1709CF9CSoDFoD$9R9$9WR9W1 FORMAT(/8F15.5) DO 900 I=1939 AR=ARH(I)/4.0 AI=AIH(I)/4.0 C1=CIH(1)/400 CR=CRH(1)/4OO BR=BRH(I)/400 BI=BIH(1)/400 ER=ERH(I)/4.o' EI=EIH(I)/4e0 ~82- FR=FRH( I )/4.0 FI -FIH(I)/4.0 U= 0(1) 6841: CF*T25(R92. U)+DF*T25(S. Z.U)-CM*CF*T25(A. R.U) l-CM#DF*T25(A. s. U)-DM*CF*T25(B. R, U)- -DM*DF*T25(B.S .U) 0843=cs*T27(R.Z.U)+Ds*727(s.z.U)-(CN*CF+CM*cs)*T27(A.R.U) l-(CN*DF+DS*CM)*T27(AoSoU)-(DN*CF+DM*CS)*T27(B.R.U) 2-(DN*DF+DM*DS)*T27(89$.LH GBAS=-CN*CS*T29(A.R9U)-CN*DS*T29(A.$oU)-DN*CS*T29(B.R.U) 1-DN*Ds*129(B.s.U) GBZI=CF*T23(R,Z9U)+DF*T23(SoZoU)-CF*CM*T23(A.R.U) l-CF*DM*T23(B.R.U)-CM*DF*T23(A.S.U)-DM*DF*T23(B.S.U) 6823=CS*T25(Raon)+DS*T25($929U)-(CM*CS+CF*CN)*T25(A.R.U) l-(CS*DM +CF*DN)*T25(89R9U)-(DS*CM+DF*CN)*T25(A.S.U) 2-(DS*DM+DF*DN)*T25(B.SoU) 6825: -CN*cs*T27(A.R. U)-cs DN*T27(B. R.U) l-CN*D$#T27(A. s. U)-DN*Ds*T27(B.s. U) 0021- —CF*T03(R.Z.U)+DF*103(S. 2. U)- CM*CF*T03(A. R. U)- CM*DF*T03(A. s. U) 1 -DM*CF*T03(B. R9U)-DM*DF*T03(B. s.U) GDAl=CF$TOS(RoZ.U)+DF#TOS(SaloU)-CM*CF*TOS(A.R.U) l-CM*DF*TOS(A959U)-DM*CF*TOS(BoR9U)—DM*DF*TOS(B.$.U) 6023=C$*T05(R92. U)+DS*TOS(S.Z. U)-(CM#CS+CF*CN)*T05(AoRoU) 1-(DM*C$+CF*DN)*TOS(B. R9U)-(CM*DS+DF*CN)*T05(A. s. U) 2-(DM*DS+DF*DN)*TOS(B. s. U) GD¢3=CS$TO7(R.Z9U)+DS#TO7(S.Z.U)-(CM$CS+CF*CN)*TO7(A.R.U) 1-(DM*cs+CF*DN)*T07(B.R.U)-(CM*Ds+DF*CN)*T07(A.s.U) 2-(DM*D$+DF*DN)*TO7(B9S9U) GDZS=-CN*CS* T07(A9R9U)-CN*DS*TO7(A9$9U) 1" DN*CS*TO7( B9R9U)‘DN*D$*T07(B9S9U) 0045=-CN*cs*T09(A.R. U)-CN*DS*TO9(A. S.U) 1-DN*CS*TO9(B. R. U)—DN*DS*T09(B.S. U) 6845: 0841+6843+6845 GBZS=GBZI+GBZ3+GBZS GDZS=GDZI+GDZB+GDZS 604$=GD4I+GD43+GD45 CF84=F84(z.U)-CM*F84(A.U)-DM*F84(B.U)-CN*F86(A.U)-DN*F86(B.U) CF82=F8212.U)-CM*F82(A.U)-Dm*F82(B.U)-CN#Fsa(A.U)-DN*F84(B.U) AWM=AR*WR-AI#WI BWM=BR*WR-BI*WI CWM=CR*WR-CI*WI EWM=ER*WR-EI#WI FWM=FR*wR-F1*w1 AWP:AR*WI+AI*WR BWP=BR*WI+BI*WR CWP=CR*WI+CI*WR EWP=ER*WI+EI*WR FWP=FR*WI+FI*WR SFA1=CON*(CF82*(YA/SQP+YB/(2.0*P*SQP))+YB/$OP*CFB4)*3.84 FBDP= CON*PEK*((GBZS+GDZS)*(YA/$QP+YO/(2.0*P*SQP)) 1+(684$+604$)#YB/SQP)*1.92 FBDM=CON$PEK*((GBZS-GDZS)*(YA/SQP+YB/(2.0*P*SQP)) l+(GB4$-GD4S)*YB/SQP)*1.92 SAVR1=-AI*5FA1-CWP*FBDM SAVII=AR*$FA1+CWM* FBDM SAXR1=AwM*Fstg~ SAX11=AWP*FBDP SAYR1=-CI*SFA1-AWP*FBDM -83- SAYIl=CR*SFA1+AWM*FBDM OCB=(RA/SQP+RB/(250*P*SQP))*CFBZ+RB/SQP*CFB4 AMIZ=CDN*QCB*3.84 SAZR1=-FI*AMIZ SAZII=FR*AM12 GBDP=(RA/SQP+RB/(2. 0*P*SQP))*(GBZS+GDZS) l+RB/SOP*(GB4S+604$) GBDM=(RA/$QP+R8/(2.0*P*$QP))*(GBZS-GDZS) l+RB/SQP*(GB4S-GD4S) AMA=-5.45*CON*QCB AMB=2.72*CON*PEK*GBDP AMC=2.72*CON*PEK*GBDM SAVRO=CR$AMA+EWM*AMB-BWM*AMC SAVIO=CI*AMA+EWP*AMB-BWP*AMC SAYRO=BR*AMA-CWM*AMC SAYIO= BI*AMA-CWP*AMC SCRO= SAVR1**2+SAVI1**2+SAXR1**2+SAXI1**2+$AYR1**2+SAYII**2 CRO$1= SCRO+SAZR1**2+SA211**2 . CROSO=SAVRO**2+SAVIO**2+SAYRO**2+SAYIO**2 TCROS=2.0*CRO$1+CROSO SCROS=2.0*SCRO PRINT 519. U. SCROS..CROSI. CRoso. TCROS FORMAT(5F15.5) ‘ _ RRINT 521. OCB.SAZR1.5AZI1.SAVRo.SAVIo.5AYRo.5AYIo FORMAT(7EISo4) CONTINUE CONTINUE CONTINUE CONTINUE GO TO 139 END FUNCTION FA4(x.U) COMMON R DEN=1 oO/(P+X) v= U*U/(4.0*(P+X)) EVF=EXRF(-V) FA4=U**3*EVF*DEN**4/16.0 RETURN END FUNCTION FA5(x.U) COMMON P OEN=1.0/(R+x) v= U*U/(4. 0*(P+X)) EVF=EXRF(-V) FA6= U**3*EVF*DEN**5 *O.25*(1.0-O. 25*V) RETURN END FUNCTION FA8(x. U) COMMON P OEN=1.0/(R+x) v= U*U/(4.0*(P+X)) EVF=EXRF(-V) FA8=1.25*U**3*OEN**6*EVF*(1.0-o.5*v+o.os*v*V) RETURN ENO FUNCTION F82(x.U) COMMON P ( DEN=loO/(p+X) V= U#U/(4o0*(P+X)) EVF=EXPF(-V) F82=U*EVF*DEN**2*0025 RETURN END C FUNCTION FB4(X9U) COMMON P OEN=1.0/(R+x) . V= U*U/(4o0*(P+X)) EVF=EXPE(-V) FB¢=U*DEN**3*EVF*O.5*(1.0-005*V) RETURN ENO _ FUNCTION F86(X9U) COMMON P DEN=loO/(P+X) V: U*U/(4.0#(P+X)) EVF=EXPF(-V) F86=1.5*U*DEN**4*EVF*(1.0-V+V*V/6.0) ( RETURN END FUNCTION FBB(X9U) COMMON P DEN=1.0/(P+X) _ v: U*U/(4.0*(P+X)) EVF=EXPF(-V) . FBB=6.0*U*DEN**5*EVF*(1.0-1.5*V+O.5*V*V-V**3/24o0) RETURN . END FUNCTION T45(X9Y9U) COMMON P OEN=1.0/(P+X+Y) V=U*U/(4.0*(P+X+Y)) EVF=EXPF(“V) ' T45=U**4#EVF*DEN**5/32.0 RETURN END FUNCTION T47(X9Y9U’ COMMON P DEN=1.0/(P+X+Y) V=U*U/(4.0*(P+X+Y)) EVF=EXPF(-V) T47=0.156*U#*4*DEN**6*EVF#(l.0-O.2*V) RETURN . ' END FUNCTION T49(X9Y9U) COMMON P DEN=loO/(P+X+Y) V=U*U/(4.0*(P+X+Y)) EVF=EXPF(-V) T49=0094*U**4*DEN#*7*EVF*( l 00-004*V+000333*V*V) RETURN ' END FUNCTION T411(X9Y9U) COMMON P DEN=1.0/(P+X+Y) -35- V=U*U/(4.0*(P+X+Y)) V EVF=EXPF(-V) T411=6.55*U** 4*DEN**8*EVF*(1.0-0.6*V+0.1*V*V—0.00476*V**3) RETURN END FUNCTION T25(X,Y.U) COMMON P ‘ DEN=1.0/(P+X+Y) v=U*U/(4.o*(R+x+Y)T EVF- -EXPF(-V) T25: 0. 375*U*U*DEN**4*EVF*(1.0 -0.333*V ) RETURN END FUNCTION_T27(X9Y’U) COMMON P DEN=1.0/(P+X+Y) ‘V=U*U/(4.0*(P+X+Y)) EVF=EXPF(-V) T27: 1.5*U*U*DEN**5*EVF*(1.0-0. 6667* V+Oo 0835*V*V) RETURN \ T END FUNCTION T29(X9Y9U) COMMON P COEN=I.0/(P+X+Y) v=U*U/(4.0*(P+X+Y)) EVF= EXPFC-V) T29=7.5*U*U*DEN**6*EVF*(1.0-V+0. 25*V*V-O. 016667*V**3) RETURN ‘ END FUNCTION T211(X,Y9U) COMMON P. _ 'DEN=Io0/(P+X+Y) . V=U*U/(4.0*(P+X+¥)) EVF=EXPF(-V) T211-—45.0*U*U*DEN**7*EVF*(1.0-1.333*V+0o 5*V*V+0 00278#V*#4 1- o. 0667*V**3) . I RETURN END FUNCTION T23(X9Y9U) COMMON P DEN=1.0/(P+X+Y) V=U*U/(4.0*(P+X+Y))_ EVF=EXPF(-V) T23: O.125*U#U*DEN**3*EVF RETURN END FUNCTION T03(X¢Y9U) COMMON P DEN=1.0/(P+X+Y) V=U*U/(4.0#(P+X+Y)) EVF=EXPF(-V) TO3=0.5*DEN#*2 *EVF*(1.0-V) RETURN END FUNCTION T05‘X9Y 9U)! COMMON P DEN=1o0/(P+X+Y) I ‘ I ' ‘ ' ' .(~ .1. I i ’ I ‘1 l h - I I . . ‘l. ..J . A -86- v=U*U/(4.o*(P+x+Y)) EVF=EXPF(-V) 105=EVF*DEN**3*(1.0-2.04V+0.5*V*V) RETURN END FUNCTION TO7(X9Y9U) COMMON P 0EN=1.0/(P+X+Y) ' v=u*U/(4.o*(P+x+Y)). EVF=EXPF(-V) T07 =3.0*DEN**4*EVF*(1.0-3.0*V+1.5*V*V-0.16667*V** 3) RETURN . < END HflmTION T09(X9Y¢U) COMMON P ‘ DEN=100/(p+X+Y) V:U*U/(4.o*(P+x+Y)) EVF=EXPF(-V) 109:12.0*DEN**5*EVF*(1.0-4.o*v+3.0*V*v-o.6667*V**3+0.0417*v**4) RETURN ' END HmmTION T011(X9Y9U) COMMON P [EN=100/(P+X+Y’ V=U#U/(4.0*(P+X+Y)) EVF=EXPF(-v) . 1011=60.0*DEN**6*EVF*(1.0-5.0*v+5.0*V*v-1.667*V**3+0.208*v*#4 10.00832*v*#5) RETURN END ENO 0.192 0.288 0.382 0.479 0.572 0.665 0.760 0.940 1.03 1.12 1.200 1.290 1.38 1.450 1.620 1.690 1.770 1.840 1.910 1.980 2.040 2.160 2.220 2.280 2.330 2.360 2. 30 2.47 2.5550 2.580 2.620 2.640 2.670 2.690 a -.4523 -.0256 -.0029 ' -.4411 -.0505 -.0050 5 -.4228 -.0741 -.0055 ’ ‘03980 “00957 ’00037 5 ”03672 “.1149 .0008 s -.3314 -.1131 .0082 3 -.2915 .-.1442 .0187 “02485 ”01538 .032 -.2035 -.1598 .0479 ‘01576 -01623 00657 -.1120 -.1613 .0851 -.0675 -.1570 .1054 ”00252 “01498 .1262 -00142 -01399 01470 00498 “.1279 01676 .0812 -.1135 .1877 .1078- -.0978 .2075 5 .1293 -.0810 .2271 3 .1454 -.0632 .2466 3 .1559 -.0448 .2663 84 26 J7 92 178 mg 95 .1608 .1599 .1533 .1410 .1230 .0994 .0704 .0362 -.0030 ”.0469 ”.09500 ”.1467 ”.2014‘ ”.2580 -.3157 -.3734 ”.4298 -.4836 ”.5336 ”.0721 ”.0704 -.0676 ”.0640 ”.0597 ”.0548 ”.0498 ”.0448 .‘.0401 ”.0360 -.0326 ”.0302 -.0288 ”.0286 ”.0297 ”.0319 -.0352 ”.0395 -.0450 -.0511 ”.0580 ”.0656 ”@0737 -.0823 ”.0915 “.1014 -.1118 -.1231 ”.1351 4.1481 -.1620 -.1769 ”.1927 ”.2092 ”.2262 ”.2435 -.2607 ”.2774 ”.0260 ”.0069 .0121 .0310 .0498 .0681 .0858 .1027 .1186 .1331 ‘.1458 .1564 .1644 .1695 .1714 .1696 .1640 .1545 .1412 ”1.005 ”.9390 ”.8339 ”.6951 ”.5299 ,”.3472 ”.1562 ”.0341 .2150 .3794 .5216 .6376 .7254 .7850 .8178 .8266 .8151 .7874 .7478 1.7004 .6486 .5952 .5421 .4904 .4407 .3929 .3465 .3009 .2555 .2100 .1641 .1181 .7235 .0275 ”.0157 ”0.563 -.0937. ”.1271 .2864 .3071 .3284 .3502 .3722 .3939 .4147 .4338 .4503 .4633 .4721 .4757 .4735 .4650 .4500 .4283 .4000 .3653 .3248 ”.0706 -.0646 ”.0547 ”.0414 -.0250 ”.0061 .0146 .0366 .0590 0.0811 .1023 .1217 .1389' .1531 .1639 .1709 .1737 .1721 .1661 .1554 .1402 .1206 .0966 .0686 .0368 .0014 ”.0371 ”.0784 ”.1222 ”.1679 -.2150 -.2631 ”.3115 ”.3596 ”.4068 ‘.4525 ”.4958 -.5361 -87- -1.519 -1.492 ”1.447 ”1.388 ”1.317 ”1.238 -1.153. -1.065 -.9772 ”.8908 ”.8068 ”.7255 -.6465 -.5688 -.4914 ”.4130 ”.3328 -.2503 ”.1659 ”.0803 .0049 .0874 .1646 .2337 .2921 .3373 .3674 .3814 .3790 .3609 .3285 .2841 .2304 .1703 .1069 .0432 -.0182 ”.0752 -.0986 -.0954 ”.0901 -.0828 ”.0735 -.0623 -.0495 '-.0351 ”.0194 ”.0027 .0149 .0329 .0511 .0690 .0862 .1025 .1173 .1304 .1412 .1494 .1548 .1570 .1557 .1508 .1422 .1298 .1137 2.0939 ”.0706 -.0441 .0148 '”.0168 "-.0503 ”.0849 -.1201 ”.1551 -.1892 -.2215 ”.2931 4.31 -.11 -11.58- 0.0 -.03459 2.175 -2.57 '5.1562 349.2 0.0 -2.5859 4.56 -4.64 -.5727 -5.642 0.0 -.26942 ”2.85 3.32 -88- ".1262 .5 '0.0 .2 ”.2514 .45 0.0 .35 APPENDIX VI To evaluate J2 and J3 for the calculations involved in 40 Mev, we have used (26) J (3‘) + Jnfl‘X) . gr; Jn(X) (AVI.1) n-1 and for -3 < X6 3 x 2 x 4 J00!) = 1 -2.2499997(3) + 1.2656208(3) - .3163866(§)5 + .044447993E 8 - .0039444(§)1° + .00021(§ 12 (AVI.2) Jim x - 1 -.56549985<§>2 + .21093573<§)" - .03954289(§)6 + .00443319(§)8 - .00031761(§)1°‘* .00001109(§)12 (471.3) and for 3 g: x.<,9o J00!) - i?- fo ' Case, to = .79788456 - .00000077(%) --.00552740(§)2 -.00009512(g)3 + .00137237(%)h -.00072805(;)5 T .00014476cg)6 6°: 1 -.78539816 «041663970; -.000039546%)2 + .0026573(;)3 -39- -90- -.00054125(%)“ -.00029333(;)5 + .00013558(3x)6 (AVI.4) J1 " £1. °°8 91 ‘5 2 r1 . .79788456 + .00000156(%) + .01659667(;) + .00017105(;)3 .. .00249511Q)” + .00113653(%)5 .. .0002033(%)6 91 = -2.35619449 + .2499612(§> + .00005650(«3)2 .. .00637879(%)3 1|, 4- .00074348(%) 4» .00079824(;-)5 - .00029166(3.)6 x (AVI.5) One must be careful in using the above approximation for x . L )Illlol) . — . T‘1 a .1. .- . -. . - .1 1 . . . --_)-)-1 1 . . . . . :- _ .. .1- -1: . w))l.. . _ T . . m T 1. 1. 11%) .1 ) 0| 1H . . , . T T . u ,. . 1. ) . .. . ,T_.. .-. ..... 1.1-FT .-)-T ... . . . --...-- -. ... T .. - . T . . ... . ... . _ . 11) . 1. . . ... - w u m . w - . w (131 .P). I. W - .H . .. . .. . ... .. . T u. H. . - . . ) . z 1).)“ .UT. . -. . ...1 T .1.. ._.. . 1 ..1“. . 4 .1” L. T . . . .-. . 1. . .... 1 .1.1 T. . - . T T; r . .. I... T .1... 0.11.11.1-1).).., T... ...:-T 1. T T T... ..1.“ .. .. 1. ..:... . T: .... T _ . . . . T T .. _. T .1 . T. 1. . ..--111--....) -. .1)...- .1vT-T . T ... .. .... T. .. . , .4. T. .. T . . .. .... . T .T .. . ... ., T. .T.. . T . T .. ... ...1 J .- .. -.- . . . .. 1. .. o T . - “ T o 1 . a .. .. .~ 1. n. ... . .. . r . T . 1.)... ))).l|_))..l.1!|b. .. . . . . . . .1 1H. . . H: . - . 11101111.). . - . ... . . T . - 1. 1 I T . 1. . T . . .... . . T. .. .. 1..“.-1) .1-).--{11- .-1 .- Tm _ . - ... T . . 1 .- 1).......).... 1) .T . . . . .. .. O. . . .11-)--- .. .. .. ,. . . .. _ . )1) --1.- . ..-)..-1H. 1“ . T. j.“ -. . . H .T ._ ., . - .- -. 1.1. .1 1. . . T . . . . .. T ,;. ... ; , . . .. .1 . .. 1 1 w - T . 1 . . .- .1. . .. . . 1. T 4 .l).. w. . . . .1. T .U T. T .. . ,. . ”---1-r ) .1 . . .. - . . 1. . -. . . 1“ )1 I..0.)11t1))11. . .... H 1 . H . .H . . .- W . . ..11)1.1I)1.01.) . . . 1. . . . 1m . . 1 . 1 .1 T. . - . .1. r1 .))1)1.1 « _ T - .. 1 .. . ..1 - 1! 1111).).-- . T .1 1 . - T T . T ... T. .1 T. T T . .T.-.-..1-). ).--1.1.1-. 1T .. . . 1 -. .. - f 1. . . .. -_ . T .)11. ...1-1...-.-) -. .. . .- .. . . .- 1 - .- . .1.-1. . . 1.11 1111.1 . T ..-1.T.1 1.--.-...1...T.1.4 . .T. .T- .. T ., U. -. H . -1-.T.-.1...r----)-11 -.1-111.-. 1- - 1-.. .1)? 1 . . 1. ,- . . . 1 T .- . .. I )1. 1 111.»)1H.. . ... .. . .. .1 T. T . T... T. T T . .. .- . T . . T .. .-I)-)-.....-- ..1-).. T1; - .- .-u- ..1 .T - - .. -.-..- 1 . . . - . . . T .- . 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