Coupled-channels analyses for large-angle quasi-elastic scattering in massive systems

重イオン反応系における後方準弾性散乱のチャンネル結合計算による解析

Zamrun, F. M.*; 萩野 浩一*; 光岡 真一; 池添 博

Zamrun, F. M.*; Hagino, Koichi*; Mitsuoka, Shinichi; Ikezoe, Hiroshi

We discuss in detail the coupled-channels approach for large-angle quasi-elastic scattering in massive systems, where many degrees of freedom may be involved in the reaction. We especially investigate the effects of single-, double-, and triple-phonon excitations on the quasi-elastic scattering for Ti, Cr, Fe, Ni, and Zn+Pb systems, for which the experimental cross sections have been measured recently. We show that the present coupled-channels calculations well account for the overall width of the experimental barrier distribution for these systems. In particular, it is shown that the calculations taking into account the double-quadrupole phonon excitations in the projectiles and triple-octupole phonon excitations in the target reasonably well reproduce the experimental quasi-elastic cross section and barrier distribution.