Systematic study ofαdecay half-lives for even-even nuclei within a two-potential approach

Abstract

α decay is a common and important process for natural radioactivity of heavy and superheavy nuclei. The α decay half-lives for even-even nuclei from Z=62 to Z=118 are systematically researched based on the two-potential approach with a quasi-stationary state approximation. To describe the deviations between experimental half-lives and calculated results due to the nuclear shell structure, a hindrance factor related with α particle preformation probability is introduced. Our results can well reproduce the experimental data equally to the density-dependent cluster model and the generalized liquid drop model. We also study the isospin effect of nuclear potential in this work. Considering the isospin effect the calculated results improved about 7.3%.

Systematic study of α decay for odd- A nuclei within a two-potential approach

“…where V 0 and a are the depth and diffuseness for the nuclear potential, respectively. In previous work, we have obtained a set of isospin dependent parameters, which is a = 0.5958 fm and V 0 = 192.42 + 31.059 N −Z A MeV [30], where N , Z and A are the neutron, proton and mass numbers of the daughter nucleus, respectively. Besides, R and r denote the nuclear sharp radius of the parent nucleus and the distance between the α particle and daughter nucleus, respectively.…”

“…And it takes as P 0 = 0.35 in this work. The variation of α preformation probability can be estimated by the analytic formula [9,30,32], which can be described by the following expression…”

“…Recently we have preformed systematic calculation on α decay half-lives and α preformation probability for even-even nuclei based on the isospin dependent nuclear potential [30]. In this paper, our previous work [30] is extended to calculate the α decay half-lives of odd-A nuclei. The odd-even staggering effect of α decay half-lives is discussed in detail.…”

Systematic study of α decay half-lives based on Gamow–like model with a screened electrostatic barrier

“…α decay, as an important tool to investigate SHN, provides abundant information about the nuclear structure and stability of SHN [6,12,1,13]. Nowadays, there are many theoretical models used to study α decay including the cluster model [14,15,16], the unified model for α decay and α capture [17,18], the liquid drop model [19,20,21,22,23], the two-potential approach [24,25,26,27,28,29,30], the empirical formulas [1,31,32,33] and others [34,35,36,37,38,39].…”

Theoretical Studies on the α-decay Half-Lives of Even-Even Lv Isotopes

“…Sun et. al studied α-decay half-live for even-even nuclei by using two potential approaches with a quasistationary state approximation [9]. Javadimanesh et.…”