Calculations of Fission Properties Using Microscopic Models for Astrophysics Applications

Details Calculations of Fission Properties Using Microscopic Models for Astrophysics Applications Calculations of Fission Properties Using Microscopic Models for Astrophysics Applications

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..769.1319d&link_type=abstract

INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY. AIP Conference Proceedings, Volume 769, pp. 1319-1322 (200

Astronomy and Astrophysics

Astrophysics

Spontaneous Fission, Neutron-Induced Fission, Nuclear Reaction Models And Methods, Beta Decay, Double Beta Decay, Electron And Muon Capture, Fundamental Aspects Of Astrophysics

Scientific paper

Potential energy surfaces obtained with a Skyrme-Hartree-Fock-Bogoliubov method in a multidimensional deformation space are analysed in order to obtain the fission properties of nuclei relevant to the r-process nucleosynthesis. Static fission paths consisting of single-, double-, and triple-humped barriers are determined using the method of steepest descent. The heights and widths of the individual barriers are estimated by fitting them with inverted parabolas. Spontaneous-fission half-lives, neutron-induced fission and β-delayed neutron emission and fission rates are subsequently calculated using the Hill-Wheeler fission transmission coefficients. The nuclear level densities at ground-state and saddle-point deformations are obtained from statistical calculations using the same microscopic Hartree-Fock-Bogoliubov model. The β-delayed emission rates are based on the β-strength functions given by the gross theory. The results of these global default calculations are first compared with existing experimental data and discussed.

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