Fission of <math>209Bi</math> By 60-270 Mev Tagged Photons: Cross Section Measurement and Analysis of Photofissility

Nota de FísicaPublicado

Fission of $<math>^{209}Bi</math>$ By 60-270 Mev Tagged Photons: Cross Section Measurement and Analysis of Photofissility

M. L. Terranova; G. Ya. Kezerashvili; V.A.Kiselev; A.M. Milov; S.I. Mishnev; I. Ya. Protopopov; V. N. Rotaev; D.N. Shatilov; O. A. P. Tavares

1996

Autores: M. L. Terranova; G. Ya. Kezerashvili; V.A.Kiselev; A.M. Milov; S.I. Mishnev; I. Ya. Protopopov; V. N. Rotaev; D.N. Shatilov; O. A. P. Tavares
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1996
Descrição: Tagged photons produced by the ROKK-2 facility have been used to measure the photofission cross section of <math>^{209}Bi\,\!</math> in the energy range 60-270 MeV. Photofission events were detected by using a nuclear fragment detector designed for fission experiments, based on multiwire spark counters. Fissility values have been deduced and compared with available data obtained in other laboratories by using monochromatic photons. These data, together with early measurements obtained near photofission threshold, have been analysed in the framework of a two-step model which considers the primary photointeraction occurring via the quasi-deuteron and/or photomesonic processes, followed by a mechanism of evaporation-fission competition for the excited residual nucleus. The model was found to reproduce the main experimental features of <math>^{209}Bi\,\!</math> photofissility up to 300 MeV.
Ano: 1996
Número: CBPF-NF-038/96
Vínculo com tese: Não
Vínculo com bolsa: Não