| 近垒能区32S+90,96Zr势垒分布的研究 |
| |
| 引用本文： | 吴秀坤,林承键,杨峰,刘祖华,张焕乔,张春雷,周平.近垒能区32S+90,96Zr势垒分布的研究[J].中国物理 C,2006,30(2):105-107. |
| |
| 作者姓名： | 吴秀坤 林承键 杨峰 刘祖华 张焕乔 张春雷 周平 |
| |
| 作者单位： | 中国原子能科学研究院,北京102413 |
| |
| 摘 要： | 精确测量了32S+90,96Zr两系统的背角准弹散射激发函数, 总体误差小于1%, 从中分别抽取了它们的势垒分布, 对比观测到32S+96Zr的势垒结构扁平且向低能区展宽, 这种
势垒可导致在垒下能区该体系的熔合截面的大大增强. 32S+96Zr与32S+90Zr相比
存在较强的中子转移反应, 且转移Q值为正. 32S+96Zr势垒的扁平结构可能是中子转移道耦合所致, 这会导致32S+96Zr垒下熔合截面大的增强.
|
| 关 键 词： | 准弹激发函数 势垒分布 中子转移 |
| 收稿时间： | 2005-06-13 |
| 修稿时间： | 2005-06-132005-09-05 |
Near-Barrier Quasi-elastic Cross Sections and Barrier Distribution of 32S+90,96Zr |
| |
| WU Xiu-Kun,LIN Cheng-Jian,YANG Feng,LIU Zu-Hua,ZHANG Huan-Qiao,ZHANG Chun-Lei,ZHOU Ping.Near-Barrier Quasi-elastic Cross Sections and Barrier Distribution of 32S+90,96Zr[J].High Energy Physics and Nuclear Physics,2006,30(2):105-107. |
| |
| Authors: | WU Xiu-Kun LIN Cheng-Jian YANG Feng LIU Zu-Hua ZHANG Huan-Qiao ZHANG Chun-Lei ZHOU Ping |
| |
| Institution: | China Institute of Atomic Energy, Beijing 102413, China |
| |
| Abstract: | Quasi-elastic cross sections have been measured for 32S 90,96Zr with high accuracy near the Coulomb barrier at backward angles and the barrier distributions are extracted from them. We find that barrier distribution of 32S 96Zr is flat and extends to low energies. The sub-barrier fusion cross sections are strongly enhanced because of such barrier distribution. Compared with the reaction of 32S 90Zr, 32S 96Zr has stronger neutron transfers up to the six-neutron pickup, which is due to the positive Q values of neutron transfers in the latter. This indicates that the neutron transfer may play a role in the enhancement of sub-barrier fusion for 32S 96Zr. |
| |
| Keywords: | quasi-elastic cross section barrier distribution neutron transfer |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国物理 C》浏览原始摘要信息 |
| 点击此处可从《中国物理 C》下载免费的PDF全文 |
|
