Optical model potentials for He-6+Zn-64 from Cu-63(Li-7, He-6)Zn-64 reactions
Optical model potentials for He-6+Zn-64 from Cu-63(Li-7, He-6)Zn-64 reactions
复制标题
Cu-63(Li-7, He-6)Zn-64 反应中 He-6 Zn-64 的光学模型势
DOI：
10.1103/physrevc.95.034616
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发表时间：
2017
影响因子：
3.1
通讯作者：
Bao P. F.
中科院分区：
文献类型：
--
作者：
Yang L.;Lin C. J.;Jia H. M.;Wang D. X.;Sun L. J.;Ma N. R.;Yang F.;Wu Z. D.;Xu X. X.;Zhang H. Q.;Liu Z. H.;Bao P. F.
在15.21 MeV、16.33 MeV、23.30 MeV、27.30 MeV和30.96 MeV下测量了转移反应角分布。以弹性散射得到的入射通道相互作用势为输入，分别用扭曲波玻恩近似(DWBA)和耦合反应通道(CRC)方法对实验数据进行拟合，提取出出射通道中晕核系统的光学势。结果表明，在弱束缚体系中存在阈值反常，色散关系可以用来描述实势和虚势之间的关系，而对于晕系统，实势和虚势在所研究的能区内几乎保持不变。此外，用CRC方法提取的势能很好地再现了系统的实验弹性散射，而用DWBA方法提取的势不能很好地再现系统的弹性散射，在没有耦合的情况下。该工作验证了转移方法在中等质量靶区的有效性，为进一步研究奇异核系统的光学势奠定了坚实的基础。
Angular distributions of the transfer reactionwere measured at, 15.21, 16.33, 23.30, 27.30, and 30.96 MeV. With the interaction potentials of the entrance channelobtained from elastic scattering data as input, the optical potentials of the halo nuclear systemin the exit channel were extracted by fitting the experimental data with the distorted-wave Born approximation (DWBA) and coupled reaction channels (CRC) methods, respectively. The results show that the threshold anomaly presents in the weakly bound system ofand the dispersion relation can be adopted to describe the connection between the real and imaginary potentials, while both the real and imaginary potentials nearly keep constant within the researched energy region for the halo system of. Moreover, calculations by the potentials extracted from the CRC method can reproduce the experimental elastic scattering of thesystem rather well, but those by the potentials from the DWBA method cannot, where the couplings betweenandare absent. This work verifies the validity of the transfer method in the medium-mass target region and lays a solid foundation for the further study of optical potentials for exotic nuclear systems.