摘要
本工作通过实验测量了~(208)Pb(~7Li,~6He)~(209)Bi体系的单质子转移反应角分布,以及入射道~7Li+~(208)Pb体系的弹性散射角分布。束流~7Li的能量分别为25.67,28.55,32.55,37.55和42.55 MeV。本次的实验数据与取自文献中的~7Li入射能量为52 MeV的实验数据一同进行了分析,抽取了入射道~7Li+~(208)Pb体系,以及出射道晕核~6He+~(209)Bi体系的相互作用光学势。结果表明,利用转移反应抽取得到的出射道晕核体系的光学势参数能够很好地重现目前已有的实验数据,验证了这种方法的可行性以及所得结果的可靠性。
Angular distributions of the ~(208)Pb(~7Li,~6He)~(209)Bi reactions with one-proton transferred to the ground,state of ~(209)Bi were measured at E_(lab) = 25.67,28.55,32.55,37.55,and 42.55 MeV.The experimental data and the data available in the literature at E_(lab)=52 MeV were analyzed within the theoretical framework of the distorted wave Born approximation and coupled reaction channels,respectively.The optical model potentials for the exotic system ~6He+~(209)Bi have been extracted by means of fitting the angular distributions of transfer reactions.In the analyses,interaction potentials of the entrance channel ~7Li+~(208)Pb were derived from the elastic scattering data.Furthermore,the angular distributions of elastic scattering derived by direct measurement for the ~6He+~(209)Bi system can be satisfactorily reproduced by employing the potentials extracted through the transfer reactions.
引文
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[3]E.F.Aguilear,J.J.Kolata,F.M.Nunes et al.,Phys.Rev.Lett.84,5058(2000).
