Unusual Threshold Anomaly in the ^6Li+^208Pb System |
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引用本文: | 张春雷,张焕乔,林承键,阮明,刘祖华,杨峰,吴秀昆,周平,安广鹏,贾会明,吴振东,徐新星,白春林.Unusual Threshold Anomaly in the ^6Li+^208Pb System[J].中国物理快报,2006,23(5):1146-1149. |
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作者姓名: | 张春雷 张焕乔 林承键 阮明 刘祖华 杨峰 吴秀昆 周平 安广鹏 贾会明 吴振东 徐新星 白春林 |
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作者单位: | [1]School of Physics, Peking University, Beijing 100871 [2]China Institute of Atomic Energy, Beijing 102413 |
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基金项目: | Supported by the Major State Basic Research and Development Programme under Grant No G2000077400, and the National Natural Science Foundation of China under Grant No 10375095. |
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摘 要: | 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.
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关 键 词: | 不平常阈规则 ^6Li+^208Pb系统 有角分配 弹性散射 光势能 |
收稿时间: | 2005-12-27 |
修稿时间: | 2005-12-27 |
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