New approximation of the energy dependences of total cross sections for proton-induced fission of actinide nuclei
The energy dependences of the cross sections for the fission of {sup 232}Th to {sup 239}Pu nuclei that is induced by protons of energy in excess of 50 MeV are proposed to be approximated by the sum of two functions. Of these, the first decreases exponentially with increasing proton energy. It represents the contribution of two-step fission, which competes with particle evaporation. The second function decreases exponentially as the energy grows to about 200 MeV, whereupon it increases up to an energy of 1 or 2.5 GeV. After that, it again decreases for {sup 232}Th to {sup 233}U nuclei or remains nearly unchanged for {sup 237}Np and {sup 239}Pu nuclei. This function is likely to represent the sum of the contributions from three modes of single-stage fission.
- OSTI ID:
- 21404673
- Journal Information:
- Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 12 Vol. 71; ISSN 1063-7788; ISSN PANUEO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTINIDE NUCLEI
ACTINIDES
ALPHA DECAY RADIOISOTOPES
APPROXIMATIONS
BARYONS
CALCULATION METHODS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FISSION
GEV RANGE
HADRONS
HEAVY ION DECAY RADIOISOTOPES
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
METALS
MEV RANGE
NANOSECONDS LIVING RADIOISOTOPES
NEON 24 DECAY RADIOISOTOPES
NEPTUNIUM 237
NEPTUNIUM ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PLUTONIUM 239
PLUTONIUM ISOTOPES
PROTONS
RADIOISOTOPES
SPONTANEOUS FISSION RADIOISOTOPES
THORIUM 232
THORIUM ISOTOPES
TOTAL CROSS SECTIONS
URANIUM 233
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES