Role of a high ground-state centrifugal barrier in the breakup of the ^(31)Ne nucleus  

作　　者：B.Mukeru 

机构地区：[1]Department of Physics,University of South Africa,P.O.Box 392,Pretoria 003,South Africa

出　　处：《Chinese Physics C》2023年第2期144-148,共5页中国物理C（英文版）

摘　　要：An analysis of the breakup of the 31 Ne weakly-bound neutron-halo system on a lead target is presented,considering the 2p_(3/2) and 1f_(7/2) ground-state configurations.It is shown that a high centrifugal barrier almost wipes out the breakup channel,thus assimilating the breakup of a weakly-bound system to that of a tightly-bound system,and also reduces the range of the monopole nuclear potential.Consequently,a high centrifugal barrier prevents the suppression of the Coulomb-nuclear interference(CNI) peak by weakening couplings to the breakup channel and reducing the range of the monopole nuclear potential,two main factors that would otherwise suppress such a peak.The present study also identifies couplings to the breakup channel and a long-ranged monopole nuclear potential as the main factors that lead to the suppression of the CNI peak.A low centrifugal barrier together with a Coulomb barrier would also effectively prevent the suppression of the CNI peak in proton-halos as reported in the case of the 8B proton-halo.

关 键 词：centrifugal barrier Coulomb-nuclear interference peak elastic scattering cross section 

分 类 号：O571[理学—粒子物理与原子核物理]