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Photofission cross sections of $sup 209$Bi, $sup 232$Th, and $sup 238$U at intermediate energies

Journal Article · · Notas Fis., Cent. Brasil. Pesqui. Fis., v. 21, no. 5, pp. 67-97
OSTI ID:4308657
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Photofission cross sections were estimated for /sup 209/Bi, /sup 232/Th and /sup 238/U, in the energy range from 0.15 GeV up to 2 GeV, by using flssility values computed with the Monte Carlo Method. For the calculation of the fissilities, use was made of some already known results of proton-induced intranuclear cascade calculations, in order to obtain information about mass- number, atomic-number, and excitation-energy distributions of the post-cascade nucleus. The calculation was carried out as a fission-evaporation competition, by using an energy dependence of the ratio of the neutron evaporation width to fission width. The results were compared with experimental data, and the comparison showed that the photofission cross sections are consistent with the photomeson mechanism of nuclear excitation. (6 figures, 3 tables) (auth)
Research Organization:
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro
NSA Number:
NSA-29-030825
OSTI ID:
4308657
Journal Information:
Notas Fis., Cent. Brasil. Pesqui. Fis., v. 21, no. 5, pp. 67-97, Journal Name: Notas Fis., Cent. Brasil. Pesqui. Fis., v. 21, no. 5, pp. 67-97; ISSN NFBFA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

*BISMUTH 209-- PHOTONUCLEAR REACTIONS
*PHOTONUCLEAR REACTIONS-- PHOTOFISSION
*THORIUM 232-- PHOTONUCLEAR REACTIONS
*URANIUM 238-- PHOTONUCLEAR REACTIONS
EVAPORATION MODEL
EXCITATION FUNCTIONS
GEV RANGE 01-10
MEV RANGE 100-1000
MONTE CARLO METHOD
N68962 --Physics (Nuclear
Theoretical)--Nuclear Properties & Reactions
190 <= A <= 219--Nuclear Reactions & Scattering--Spontaneous & Induced Fission
N69162* --Physics (Nuclear
Theoretical)--Nuclear Properties & Reactions
A >= 220--Nuclear Reactions & Scattering--Spontaneous & Induced Fission:734
NUCLEAR REACTION KINETICS