奇Z超重核的禁戒α衰变(英文)  

Hindered α-transitions in Odd-Z Superheavy Nuclei

作　　者：许昌[1] 任中洲[1] 

机构地区：[1]南京大学物理学院,江苏南京210093

出　　处：《原子核物理评论》2013年第3期308-311,共4页Nuclear Physics Review

基　　金：National Natural Science Foundation of China(10805026,11175085,11235001,11120101005,11035001)~~

摘　　要：采用密度依赖的结团模型研究了奇Z超重核的禁戒α衰变,α粒子与子核之间的微观核势通过双折叠模型对M3Y核子-核子相互作用势以及α粒子与子核的密度积分给出。α粒子与子核之间的库仑相互作用也通过α粒子与子核的电荷密度积分给出。计算发现,由于非零角动量带来的禁戒效应和小的α粒子预形成几率,奇Z超重核的α衰变寿命会明显变长。We investigate the α-transition of odd-Z superheavy nuclei by the density-dependent cluster mo- del （DDCM）. The microscopic nuclear potential between the α-particle and the daughter nucleus is evaluated numerically from the double-folding model with the standard M3Y nucleon-nucleon interaction. The Coulomb potential is also obtained from the double-folding integral of the proton-proton Coulomb interaction with the charge density distributions of or-particle and daughter nucleus. From our calculations, enhanced stability against α-decays is found for the odd-Z superheavy nuclei due to the hindrance effect of non-zero angular momentum and the small preformation factor of the α-particle.

关 键 词：Α衰变 超重核 结团模型 

分 类 号：O571.6[理学—粒子物理与原子核物理]