Alpha-decay half-lives and Q_alpha values of superheavy nuclei
Abstract
The alpha-decay half-lives of recently synthesized superheavy nuclei (SHN) are investigated based on a unified fission model (UFM) where a new method to calculate the assault frequency of alpha-emission is used. The excellent agreement with the experimental data indicates the UFM is a useful tool to investigate these alpha-decays. It is found that the half-lives become more and more insensitive to the Q_alpha values as the atomic number increases on the whole, which is favorable for us to predict the half-lives of SHN. In addition, a formula is suggested to compute the Q_alpha values for the nuclei with Z > 92 and N > 140 with a good accuracy, according to which the long-lived SHN should be neutron rich. With Q_alpha values from this formula as inputs, we predict the half-lives of isotopes of Z = 117, which may be useful for experimental identication in the future.
Keywords
Cite
@article{arxiv.1004.2309,
title = {Alpha-decay half-lives and Q_alpha values of superheavy nuclei},
author = {Jianmin Dong and Wei Zuo and Jianzhong Gu and Yanzhao Wang and Bangbao Peng},
journal= {arXiv preprint arXiv:1004.2309},
year = {2011}
}
Comments
7 pages, 3 figures