arXiv:nucl-th/0010093·v1·Nuclear Theory
Fission barriers of neutron-rich and superheavy nuclei calculated with the ETFSI method
A. Mamdouh (1)🇧🇪 · J.M. Pearson (1,2)🇧🇪 · M. Rayet (1)🇧🇪 · F. Tondeur (3) ((1) Institut d'Astronomie et d'Astrophysique, Universite Libre de Bruxelles, Belgium, (2) Departement de Physique, Universite de Montreal, Montreal (Quebec), Canada, (3) Institut Superieur Industriel de Bruxelles, Belgium)🇧🇪
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.
Comments: 33 pages, 6 figures, to appear in Nucl. Phys. A