利用有效液滴模型研究超重元素α衰变半衰期

Theoretical Study on the Alpha Decay Half-Life of Superheavy Elements with the Effective Liquid Drop Model

利用有效液滴模型计算了偶偶超重核的α衰变半衰期,计算过程中采用了保持碎片体积守恒的 不对称形状描述以及有效惯性系数计算Gamow势垒穿透因子．首先在质子数Z为88-98的区域检验 了有效液滴模型,发现计算结果与实验符合得比较好．随后将此模型推广到Z≥100的情况,虽然只用 了两个模型参数,计算结果与实验数据符合,说明有效液滴模型是计算偶偶超重核素α衰变半衰期的一 个成功模型．

Alpha decay half-lives of even-even superheavy elements are calculated in the framework of the effective liquid drop model using the combination of constant asymmetry shape description for the mass transfer and the effective inertia coefficient.We have tested this model in the range of Z = 88-98 at first.Then we extend this model to the superheavy area of Z≥ 100. The comparisons between calculated half-lives and experimental data show that the effective liquid drop model is very efficient to describe the alpha decay process of even-even superheavy elements.