Optical model analyses of 6,7Li + 208Pb elastic scattering near the Coulomb barrier
Optical model analyses of 6,7Li + 208Pb elastic scattering near the Coulomb barrier
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DOI：
10.1016/0375-9474(94)90064-7
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发表时间：
1994-04
期刊：
影响因子：
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通讯作者：
N. Keeley;S. Bennett;N. Clarke;B. Fulton;G. Tungate;P. Drumm;M. Nagarajan;J. Lilley
中科院分区：
文献类型：
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作者：
N. Keeley;S. Bennett;N. Clarke;B. Fulton;G. Tungate;P. Drumm;M. Nagarajan;J. Lilley
在库仑势垒附近测量了[sup 208]Pb对[sup 6]Li和[sup 7]Li的弹性散射，并用光学模型进行了分析。先前的报告表明，在远高于库仑势垒的轰击能量下，两种同位素的双折叠实际势的归一化因子N[下标R]约为0.6。在本文中，我们证明，虽然在[sup 6]Li的能量接近势垒时，N[sub R]的低值仍然存在，但对于[sup 7]Li，它略大于1，并且表明该抛射体存在阈值异常。(源自)。
The elastic scattering of [sup 6]Li and [sup 7]Li by [sup 208]Pb has been measured at several energies near the Coulomb barrier and analysed in terms of the optical model. Previous reports have suggested that the normalization factor, N[sub R], for the double-folded real potential is approximately 0.6 for both isotopes at bombarding energies well above the Coulomb barrier. In this paper we show that, whereas this low value for N[sub R] persists for [sup 6]Li at energies close to the barrier, for [sup 7]Li it is somewhat greater than unity, and indicates the existence of a threshold anomaly for this porjectile. (orig.)