Quasi-elastic scattering in the 20Ne+90,92Zr reactions : role of non-collective excitations
Quasi-elastic scattering in the 20Ne+90,92Zr reactions : role of non-collective excitations
复制标题
20Ne 90,92Zr 反应中的准弹性散射：非集体激发的作用
DOI：
10.1103/physrevc.88.054621
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and N. Rowley
中科院分区：
文献类型：
--
作者：
S. Yusa;K. Hagino;and N. Rowley
传统的耦合道分析只考虑碰撞核的集体激发，不能再现Ne +Zr系统的实验准弹性势垒分布的不同行为。为了澄清这种差异的起源，我们调查的Zr同位素的非集体激发的效果。在随机矩阵模型中描述这些激发，我们明确考虑到在我们的耦合通道计算。非集体激发能够再现观察到的拖尾的峰值结构的势垒分布为Ne +Zr，而不显着改变结构中观察到的theNe+Zr系统。这种差异主要与Zr的闭合中子壳层有关。
Conventional coupled-channels analyses, that take account of only the collective excitations of the colliding nuclei, have failed to reproduce the different behavior of the experimental quasi-elastic barrier distributions for theNe+Zr systems. To clarify the origins of this difference, we investigate the effect of noncollective excitations of the Zr isotopes. Describing these excitations in a random-matrix model, we explicitly take them into account in our coupled-channels calculations. The noncollective excitations are capable of reproducing the observed smearing of the peak structure in the barrier distribution forNe+Zr, while not significantly altering the structure observed in theNe+Zr system. The difference is essentially related to the closed neutron shell inZr.