arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1009.4763nucl-thnucl-ex
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~(120)Sn(~ 6 He,~ 6 He)~(120)Sn和~(120)Sn(α,α)~(120)Sn弹性散射的比较及~ 6 He中子晕在光学势中的特征

Comparison of 120Sn(6He,6He)120Sn and 120Sn(alpha,alpha)120Sn elastic scattering and signatures of the 6He neutron halo in the optical potential

P. Mohr, P. N. de Faria, R. Lichtenthäler, K. C. C. Pires, V. Guimarães, A. Lépine-Szily, D. R. Mendes Junior, A. Arazi, A. Barioni, V. Morcelle, M. C. Morais

摘要:

从最近的$^{120}$ Sn($^6$ He,$^6$ He)$^{120}$ Sn实验的$α$粒子束污染中提取了$^{120}$ Sn($α$,$α$)$^{120}$ Sn弹性散射截面.这两个反应进行了分析,使用系统的双折叠潜力的实部和平稳变化的伍兹-撒克逊潜力的虚部。从$^{120}$ Sn($^6$ He,$^6$ He)$^{120}$ Sn数据中提取的光学势可以作为构造简单的整体$^6$ He光学势的基础。$^6$ He和$α$数据的比较表明,$^6$ He核的晕性质导致反射系数$η_L$中的明确签名:相关角动量$L$与$η_L \gg 0$和$η_L \ll 1$被转移到具有更宽分布的更大的$L$。这个签名是不存在的$α$散射数据,因此可以作为一个新的标准定义的晕核。

英文摘要:

Cross sections of $^{120}$Sn($α$,$α$)$^{120}$Sn elastic scattering have been extracted from the $α$ particle beam contamination of a recent $^{120}$Sn($^6$He,$^6$He)$^{120}$Sn experiment. Both reactions are analyzed using systematic double folding potentials in the real part and smoothly varying Woods-Saxon potentials in the imaginary part. The potential extracted from the $^{120}$Sn($^6$He,$^6$He)$^{120}$Sn data may be used as the basis for the construction of a simple global $^6$He optical potential. The comparison of the $^6$He and $α$ data shows that the halo nature of the $^6$He nucleus leads to a clear signature in the reflexion coefficients $η_L$: the relevant angular momenta $L$ with $η_L \gg 0$ and $η_L \ll 1$ are shifted to larger $L$ with a broader distribution. This signature is not present in the $α$ scattering data and can thus be used as a new criterion for the definition of a halo nucleus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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