Analysis of <math>209Bi</math> and <math>238U</math> Photofission Cross Section in the Quasi-Deuteron Region of Photonuclear Absortpion

Nota de FísicaPublicado

Analysis of $<math>^{209}Bi</math>$ and $<math>^{238}U</math>$ Photofission Cross Section in the Quasi-Deuteron Region of Photonuclear Absortpion

O. A. P. Tavares; M. L. Terranova

1992

Autores: O. A. P. Tavares; M. L. Terranova
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1992
Descrição: An analysis of the photofission reactions in the quasi-deuteron energy range of photonuclear absorption <math>(\sim 30-140 MeV)\,\!</math> has been performed for <math>^{209}Bi\,\!</math> and <math>^{238}U\,\!</math> nuclei. Experimental cross section data available in the literature have been compared with calculated values obtained from a model in which the incoming photon is assumed to be absorbed by a neutron-proton pair (Levinger's quasi-deuteron photoabsorption), followed by a mechanism of evaporation-fission competition for the excited residual nuclei. The model has been shown to reproduce the main experimental features of <math>^{209}Bi\,\!</math> and 238U photofission cross section, although unexplained differences still remain in the case of <math>^{238}U\,\!</math> -fission by <math>30-50 Mev\,\!</math> incident photons.
Ano: 1992
Número: CBPF-NF-008/92
Vínculo com tese: Não
Vínculo com bolsa: Não