TY - JOUR

T1 - Scattering of polarized 7Li by 120Sn and projectile-target spin-dependent interactions

AU - Sakuragi, Y.

AU - Yahiro, M.

AU - Kamimura, M.

AU - Tanifuji, M.

N1 - Funding Information:
We wish to thank Dr. G. Tungate for sending us experimentald ata prior to publication.W e areg ratefult o ProfessorM . Kawai for stimulatingd iscussionsT. his paperw as financiallys upportedb y Grant-in-Aid for ScientificR esearchT. he financial supportsa re also offeredb y ResearchC entero f Nuclear Physics,O sakaU niver-sitya ndI nstitutef or NuclearS tudy,U niversityo f Tokyo for performingt hec omputer work. The computero f Kyushu Universityi n additiont o thoseo f thea bovei nstitutes were utilized. One of the authors (Y.S.) also thanks the Japan Society for the Promotion of Sciencef or financial support.

PY - 1987/1/19

Y1 - 1987/1/19

N2 - Scattering of 7Li by 120Sn targets at Elab = 44 MeV is investigated in the coupled-channel frame by taking account of the projectile virtual excitations to the lowest three excited states. Calculations are performed by the cluster-folding (CF) interactions and the double-folding (DF) one. Both interactions reproduce very well the experimental data on the cross section, the vector analyzing power, the second-rank tensor ones and the third-rank tensor one in elastic and projectile inelastic scattering, although some differences are found between the CF results and the DF ones. In the calculation, the virtual excitations of the projectile are important for most of the analyzing powers and the spin-orbit interaction is indispensable for the vector analyzing power. These features are in contrast to those in 7Li-58Ni scattering at 20 MeV and are interpreted as over-Coulomb-barrier effects. The scattering amplitudes and the analyzing powers are investigated by the invariant amplitude method, which provides a key connecting the spin-dependent interactions to the analyzing powers. The method proposes an important relationship between the tensor analyzing powers, which is useful in analyses of both theoretical and experimental results. Finally, it is found that in the elastic scattering the second-rank tensor analyzing powers are proportional to the strength of the second-rank tensor interaction and the vector and third-rank tensor analyzing powers to the square or cube of the strength of this interaction, while in the inelastic scattering the cross section is proportional to the square of the strength of the tensor interaction, other quantities being weakly dependent on the strength.

AB - Scattering of 7Li by 120Sn targets at Elab = 44 MeV is investigated in the coupled-channel frame by taking account of the projectile virtual excitations to the lowest three excited states. Calculations are performed by the cluster-folding (CF) interactions and the double-folding (DF) one. Both interactions reproduce very well the experimental data on the cross section, the vector analyzing power, the second-rank tensor ones and the third-rank tensor one in elastic and projectile inelastic scattering, although some differences are found between the CF results and the DF ones. In the calculation, the virtual excitations of the projectile are important for most of the analyzing powers and the spin-orbit interaction is indispensable for the vector analyzing power. These features are in contrast to those in 7Li-58Ni scattering at 20 MeV and are interpreted as over-Coulomb-barrier effects. The scattering amplitudes and the analyzing powers are investigated by the invariant amplitude method, which provides a key connecting the spin-dependent interactions to the analyzing powers. The method proposes an important relationship between the tensor analyzing powers, which is useful in analyses of both theoretical and experimental results. Finally, it is found that in the elastic scattering the second-rank tensor analyzing powers are proportional to the strength of the second-rank tensor interaction and the vector and third-rank tensor analyzing powers to the square or cube of the strength of this interaction, while in the inelastic scattering the cross section is proportional to the square of the strength of the tensor interaction, other quantities being weakly dependent on the strength.

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U2 - 10.1016/0375-9474(87)90385-X

DO - 10.1016/0375-9474(87)90385-X

M3 - Article

AN - SCOPUS:0000977819

SN - 0375-9474

VL - 462

SP - 173

EP - 204

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 1

ER -