Cluster structure and Coulomb shift in two-center mirror systems
Cluster structure and Coulomb shift in two-center mirror systems
复制标题
二中心镜系统中的簇结构和库仑位移
DOI：
10.1051/epjconf/201716300040
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发表时间：
2017
影响因子：
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通讯作者：
S. Ebata and M. Ito
中科院分区：
文献类型：
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作者：
M. Nakao;H. Umehara;S. Sonoda;S. Ebata and M. Ito
在半微观模型的基础上，分析了α+14C的弹性散射及其复合体系18O=α+14C的核结构。α+14C相互作用势由双折叠(DF)模型和依赖密度的密歇根3射程Yukawa的有效核子-核子相互作用构造而成。将DF势应用于α+14C的弹性散射，其能量范围为Eα/Aα=5.5~8.8 MeV，并合理地再现了观测到的微分截面。用正交化条件模型(OCM)+吸收边界条件(ABC)计算了~(18)O的能谱。OCM+ABC计算预测了E=3 MeV附近相对于α阈值的0+共振的形成，这似乎与最近的实验中发现的04+共振相对应。我们还将量子力学+ABC方法应用于镜像系统，如18Ne=α+14O，并计算了18O-18Ne的库仑位移。我们发现，由于α团簇结构的发展，激发态0+态的库仑位移明显减小。这一结果有力地支持了库仑位移是识别团簇现象的一种新的探测方法。
Theα+14C elastic scattering and the nuclear structure of its compound systems,18O =α+14C, are analyzed on the basis of the semi-microscopic model. Theα+14C interaction potential is constructed from the double folding (DF) model with the effective nucleon-nucleon interaction of the density-dependent Michigan 3-range Yukawa. The DF potential is applied to theα+14C elastic scattering in the energy range ofEα/Aα= 5.5 ~ 8.8 MeV, and the observed differential cross sections are reasonably reproduced. The energy spectra of18O are calculated by employing the orthogonality condition model (OCM) plus the absorbing boundary condition (ABC). The OCM + ABC calculation predicts the formation of the 0+resonance aroundE= 3MeV with respect to theαthreshold, which seems to correspond to the 04+ resonance identified in the recent experiment. We also apply the OCM + ABC calculation to the mirror system, such as18Ne =α+14O, and the Coulomb shift of18O -18Ne is evaluated. We have found that the Coulomb shift is clearly reduced in the excited 0+state due to the development of theαcluster structure. This result strongly supports that the Coulomb shift is a candidate of new probe to identify the clustering phenomena.