奇Z超重核的禁戒α衰变(英文)

Hindered α-transitions in Odd-Z Superheavy Nuclei

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.