Photofission cross sections of $sup 209$Bi, $sup 232$Th, and $sup 238$U at intermediate energies
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, Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
High resolution photofission measurements in /sup 238/U and /sup 232/Th. Final report. [5. 8 to 12 MeV]
High resolution photofission measurements and intermediate structure in /sup 232/Th
Related Subjects
Theoretical)-Nuclear Properties & Reactions
A >= 220-Nuclear Reactions & Scattering-Spontaneous & Induced Fission:734
N68962 -Physics (Nuclear
Theoretical)-Nuclear Properties & Reactions
190 <= A <= 219-Nuclear Reactions & Scattering-Spontaneous & Induced Fission
*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
NUCLEAR REACTION KINETICS