Abstract
Neutron-induced fission cross sections of U, Np and Pu target nuclides are analyzed in fission/evaporation approximation up to 200 MeV excitation energy. Damping of collective modes contribution to the level density at excitation energies higher than ~20 MeV for saddle and equilibrium deformations is shown to be essential. Effective estimates of intrinsic level densities are obtained. Actinide first-chance fission cross sections of 238U(n, f) and 238U(p, f) reactions are found to be much different. Differences of measured proton- and neutron-induced fission cross sections of 238U are attributed to the influence of the isovector term of the nucleon-nucleus optical potential.
Original language | English |
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Pages (from-to) | 80-83 |
Number of pages | 4 |
Journal | journal of nuclear science and technology |
Volume | 39 |
DOIs | |
Publication status | Published - 2002 Aug |
Externally published | Yes |
Keywords
- Actinides
- Intermediate energies
- Nucleon-induced fission
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering