Fission Barriers of Compound Superheavy Nuclei
Abstract
The dependence of fission barriers on the excitation energy of the compound nucleus impacts the survival probability of superheavy nuclei synthesized in heavy-ion fusion reactions. In this work, we investigate the isentropic fission barriers by means of the self-consistent nuclear density functional theory. The relationship between isothermal and isentropic descriptions is demonstrated. Calculations have been carried out for Fm, Ds, 112, 114, and 124. For nuclei around 112 produced in "cold fusion" reactions, we predict a more rapid decrease of fission barriers with excitation energy as compared to the nuclei around 114 synthesized in "hot fusion" experiments. This is explained in terms of the difference between the ground-state and saddle-point temperatures. The effect of the particle gas is found to be negligible in the range of temperatures studied.
Cite
@article{arxiv.0901.0901,
title = {Fission Barriers of Compound Superheavy Nuclei},
author = {J. C. Pei and W. Nazarewicz and J. A. Sheikh and A. K. Kerman},
journal= {arXiv preprint arXiv:0901.0901},
year = {2009}
}
Comments
4 pages, 5 figures(revised according to referee's comments)