PREPRINT
3887B8F2-5A74-4987-B996-87107B8845D4

Fission barriers of neutron-rich and superheavy nuclei calculated with the ETFSI method

A. Mamdouh, J. M. Pearson, M. Rayet, F. Tondeur

Submitted on 27 October 2000

Abstract

Using the ETFSI (extended Thomas-Fermi plus Strutinsky integral) method, we have calculated the fission barriers of nearly 2000 exotic nuclei, including all the neutron-rich nuclei up to A=318 that are expected to be relevant to the r-process, and all the superheavy nuclei in the vicinity of N=184, with Z<=120. Our calculations were performed with the Skyrme force SkSC4, which was determined in the ETFSI-1 mass fit. For proton-deficient nuclei in the region of N=184 we find the barriers to be much higher than previously believed, which suggests that the r-process path might continue to mass numbers well beyond 300. For the superheavy nuclei we typically find barrier heights of 6-7 MeV.

Preprint

Comment: 33 pages, 6 figures, to appear in Nucl. Phys. A

Subjects: Nuclear Theory; Astrophysics

URL: https://arxiv.org/abs/nucl-th/0010093