Large-amplitude quadrupole shape mixing probed by the $(p,p^\prime)$ reaction: A model analysis
Large-amplitude quadrupole shape mixing probed by the $(p,p^\prime)$ reaction: A model analysis
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DOI：
10.1093/ptep/ptz095
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发表时间：
2019-04
影响因子：
3.5
通讯作者：
Koichi Sato;T. Furumoto;Y. Kikuchi;K. Ogata;Y. Sakuragi
中科院分区：
文献类型：
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作者：
Koichi Sato;T. Furumoto;Y. Kikuchi;K. Ogata;Y. Sakuragi
为了讨论核反应引起的大振幅核形状混合的可能观测结果，我们采用一个简单的集体模型，计算了跃迁密度，并通过微观耦合道计算得到了微分截面。假设球形到扁长形的过渡，我们专注于大振幅的形状混合与软的集体潜力在$\beta$方向。我们介绍了一个简单的模型的基础上的五维四极集体哈密顿量，它模拟了链的同位素表现出球形到长球形的相变。以$^{154}$Sm为例，通过控制模型参数，研究了大振幅形状混合对质子弹性和非弹性散射的影响.计算结果表明，$2_2^+$态的非弹性截面表明了四极形状混合的重要作用.
To discuss a possible observation of large-amplitude nuclear shape mixing by nuclear reaction, we employ a simple collective model and evaluate the transition densities with which the differential cross sections are obtained through the microscopic coupled-channel calculation. Assuming the spherical-to-prolate shape transition, we focus on large-amplitude shape mixing associated with the softness of the collective potential in the $\beta$ direction. We introduce a simple model based on the five-dimensional quadrupole collective Hamiltonian, which simulates a chain of isotopes that exhibit spherical-to-prolate shape phase transition. Taking $^{154}$Sm as an example and controlling the model parameters, we study how the large-amplitude shape mixing affects the elastic and inelastic proton scatterings. The calculated results suggest that the inelastic cross section of the $2_2^+$ state shows us the important role of the quadrupole shape mixing.