The Effect of Two-Step Process in Quasi-Inelastic Scattering

概要

論文の詳細を見る
An analysis of experimental data on quasi-inelastic scattering ^<56>Fe(p, n´)^<56>Co^*, ^<48>Ti(^<3>He, t´)^<48>V^* and ^<60>Ni(^<3>He, t´)^<60>Cu^* was performed assuming combination of a one- and two-step process leading to the isobaric analog states of the first 2^+ excited states of the target nuclei. Contributions of two-step processes through collective excitation of either the target or residual nucleus have been taken into account by second order perturbation theory. Coupling potentials were derived from a deformed optical potential containing an isobaric spin dependent part. The deformation parameters, β_0 and β_τ for the isospin independent and dependent potentials, respectively, were taken to be adjustable parameters. The results indicate strongly the importance of the two-step processes, especially for (p, n´) reaction. In the case of ^<56>Fe(p, n´)^<56>Co^*, agreement with experimental data is satisfactory using reasonable values of β_τ=β_0=0.24. For (^<3>He, t´) reaction the contribution of the two-step process is of the same order of magnitude as the one-step process and interferes destructively with the latter. Agreement with the experiment is unsatisfactory for the present choice of β_0 and β_τ.
理論物理学刊行会の論文
1972-02-25