Unusual Threshold Anomaly in the 6 Li+ 208 Pb System
Unusual Threshold Anomaly in the 6 Li+ 208 Pb System
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DOI：
10.1088/0256-307x/23/5/023
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发表时间：
2006-05
影响因子：
3.5
通讯作者：
Zhang Chunlei;Zhang Huan-qiao;Lin Chengjian;Ruang Ming;Liu Zu-hua;Yang Feng;Wu Xiu-Kun;Zhou Ping;An Guangpeng;J. Hui-ming;Wu Zhen-dong;Xu Xinxing;Bai Chun-lin
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文献类型：
--
作者：
Zhang Chunlei;Zhang Huan-qiao;Lin Chengjian;Ruang Ming;Liu Zu-hua;Yang Feng;Wu Xiu-Kun;Zhou Ping;An Guangpeng;J. Hui-ming;Wu Zhen-dong;Xu Xinxing;Bai Chun-lin
本文测量了~ 6Li +~（208）Pb系统在库仑势垒附近几种能量下的弹性散射角分布。通过唯象光学模型分析，提取了光学势参数。结果表明，真实的势和虚势具有明显的能量依赖性。6Li+~（208）Pb系统在近势垒能区的势行为与以前报道的~（19）F +~（208）Pb和~（16）O +~（208）Pb系统的势行为有很大不同。这种异常的阈值现象表明，破裂通道与弹性通道之间存在着强耦合，对光学势有明显的影响。
The angular distributions of elastic scattering for the 6Li +208Pb system have been measured at several energies around the Coulomb barrier. The parameters of optical potential are extracted by means of a phenomenological optical model analysis. It is found that the real and imaginal potentials show a pronounced energy dependence. The behaviour of the potential at the nearly especially sub-barrier energies in the 6Li+208Pb system is quite different from the results of some previous reports observed in other systems, such as 19F+208Pb and 16O+208Pb. This unusual threshold phenomenon indicates that breakup channel is strongly coupled with the elastic channel and has obvious effects on optical potential.