Elastic scattering of the proton drip line nuclei Be-7, B-8, and C-9 on a lead target at energies around three times the Coulomb barriers
Elastic scattering of the proton drip line nuclei Be-7, B-8, and C-9 on a lead target at energies around three times the Coulomb barriers
复制标题
质子滴线核 Be-7、B-8 和 C-9 在铅靶上的弹性散射，能量约为库仑势垒的三倍
DOI：
10.1103/physrevc.98.044608
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发表时间：
2018
影响因子：
3.1
通讯作者：
Zhan W L
中科院分区：
文献类型：
--
作者：
Yang Y Y;Liu X;Pang D Y;Patel D;Chen R F;Wang J S;Ma P;Ma J B;Jin S L;Bai Z;Guimaraes V;Wang Q;Ma W H;Duan E F;Gao Z H;Yu Y C;Sun Z Y;Hu Z G;Xu S W;Wang S T;Yan D;Zhou Y;Zhang Y H;Zhou X H;Xu H S;Xiao G Q;Zhan W L
在兰州放射性离子束线上，首次测量了质子滴线核在三倍库仑势垒附近撞击目标时的弹性散射角分布。同时进行了相同的测量。测得的铅靶弹性散射角分布在库仑彩虹角附近没有明显的减小，表明在该能量区域内，破裂耦合对弹性散射通道的影响很小。也有类似的观察。用连续介质离散耦合通道（CDCC）方法分析表明，施加在价质子上的库仑和/或离心势垒抵消了弹性散射通道上的破裂耦合效应。假设具有团簇结构的CDCC计算得到与基础设施相似的弹性散射截面。计算出的这两种假设结构的分裂截面在库仑彩虹角附近有相当大的不同，这表明在入射能量约为库仑能的三倍时，分裂截面比弹性散射截面对富质子核的结构更敏感。
Elastic scattering angular distributions of the proton drip line nucleus,, impinging on atarget have been measured for the first time at energies around three times the Coulomb barriers at the Radioactive Ion Beam Line in Lanzhou. The same measurements were made forandsimultaneously. The measured elastic scattering angular distribution ofon a lead target does not show any particular reduction at around the Coulomb rainbow angles, suggesting that the breakup coupling effect on the elastic scattering channel is very small in this energy region. A similar observation is made for. Analysis with the continuum discretized coupled channels (CDCC) method shows that it is the Coulomb and/or the centrifugal barriers exerted on the valence protons that counteract the breakup coupling effects on the elastic scattering channel. CDCC calculations assumingto have acluster structure give elastic scattering cross sections similar to those for astructure. The calculated breakup cross sections with these two assumed structures ofdiffer quite a bit at around the Coulomb rainbow angles, suggesting that the breakup cross sections, instead of the elastic scattering ones, are more sensitive to the structure of proton-rich nuclei at incident energies around three times the Coulomb barriers.