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arXiv 1012.1043nucl-ex
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库仑势垒下$^{151}$ Eu的α诱导反应分析

Analysis of alpha-induced reactions on $^{151}$Eu below the Coulomb barrier

V. Avrigeanu, M. Avrigeanu

摘要:

对靶核$^{151}$ Eu上的$(α,γ)$和$(α$,n)反应截面的新测量接近反应阈值,支持了库仑势垒以下$α$ -粒子光学模型势的最新参数的建立.一个更好的理解在这些能量的$α$粒子的光学势导致额外的部分截面,以前测量,但不考虑在模型分析的统计模型分析。在此基础上,我们尝试性地对$^{154}$ Tb中的22.7-h异构体分配了修改的$J^π$ =9的$^-$自旋和宇称。

英文摘要:

Novel measurements of $(α,γ)$ and $(α$,n) reaction cross sections on the target nucleus $^{151}$Eu, close to the reaction thresholds, support the setting up of recent parameters of the $α$-particle optical model potential below the Coulomb barrier. A better understanding of the $α$-particle optical potential at these energies leads to a statistical model analysis of additional partial cross sections that were formerly measured but not considered within the model analysis. On this basis we have tentatively assigned a modified $J^π$=9$^-$ spin and parity to the 22.7-h isomer in $^{154}$Tb.

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