Deformation dependent TUL multi-step direct modelH. Wienke1, R. Capote2, M. Herman3 and M. Sin4
1 Belgonucleaire, 2480 Dessel, Belgium
2 International Atomic Energy Agency, Nuclear Data Section, 1400 Vienna, Austria
3 National Nuclear Data Center, BNL, Upton, NY 11973, USA
4 Nuclear Physics Department, University of Bucharest, P.O. Box MG-11, Bucharest-Magurele, Romania
Published online: 21 May 2008
The Multi-Step Direct (MSD) module TRISTAN in the nuclear reaction code EMPIRE has been extended to account for nuclear deformation. The new formalism was tested in calculations of neutron emission spectra emitted from the 232Th(n,xn) reaction. These calculations include vibration-rotational Coupled Channels (CC) for the inelastic scattering to low-lying collective levels, "deformed" MSD with quadrupole deformation for inelastic scattering to the continuum, Multi-Step Compound (MSC) and Hauser-Feshbach with advanced treatment of the fission channel. Prompt fission neutrons were also calculated. The comparison with experimental data shows clear improvement over the "spherical" MSD calculations and JEFF-3.1 and JENDL-3.3 evaluations.
© CEA 2008