Proton-halo breakup dynamics for the breakup threshold in theε0→0 limit

作     者：B.Mukeru B.Mukeru

作者机构：Department of PhysicsUniversity of South AfricaP.O.Box 392Pretoria 0003South Africa 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第5期

页      面：166-172页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

主　　题：proton halo breakup cross section breakup threshold 

摘      要：Proton-halo breakup behavior in theε0→0 limit(whereε0 is the ground-state binding energy)is stud-ied around the Coulomb barrier in the^(8)B+^(58)Ni reaction for the first *** practical purposes,apart from the ex-perimental 8B binding energy of 137 keV,three more arbitrarily chosen values(1,0.1,0.01 keV)are *** is first shown that the Coulomb barrier between the core and the proton prevents the^(7)Be+p system from reaching the state of an open proton-halo system,w hich,among other factors,would require the ground-state wave function to extend to infinity in the asymptotic region,asε0→*** elastic scattering cross section,which depends on the density of the ground-state wave function,is found to have a negligible dependence on the binding energy in this *** total,Coulomb and nuclear breakup cross sections are all reported to increase significantly fromε0=137 to 1.0 keV,and converge to their maximum values asε0→*** increase is mainly understood as coming from a longer tail of the ground-state wave function forε0≤1.0 keV,compared to that forε0=137 *** is also found that the effect of the continuum-continuum couplings is to slightly delay the convergence of the breakup cross *** analysis of the reaction cross section indicates a convergence of all the breakup observables asε0→*** results provide a better sense of the dependence of the breakup process on the breakup threshold.