Systematic Studies of Asymmetric Mass Distributions in Proton-induced Fission of Actinides

S. Goto; D. Kaji; I. Nishinaka; Y. Nagame; S. Ichikawa; K. Tsukada; M. Asai; H. Haba; S. Mitsuoka; K. Nishio; M. Sakama; Y. L. Zhao; K. Sueki; M. Tanikawa; K. Takamiya; H. Kudo; H. Nakahara

doi:10.14494/jnrs2000.3.63

S. Goto, D. Kaji, I. Nishinaka, Y. Nagame, S. Ichikawa, K. Tsukada, M. Asai, H. Haba, S. Mitsuoka, K. Nishio, M. Sakama, Y. L. Zhao, K. Sueki, M. Tanikawa, K. Takamiya, H. Kudo, H. Nakahara

Author information

S. Goto
Department of Chemistry, Niigata University
D. Kaji
Department of Chemistry, Niigata University
I. Nishinaka
Japan Atomic Energy Research Institute
Y. Nagame
Japan Atomic Energy Research Institute
S. Ichikawa
Japan Atomic Energy Research Institute
K. Tsukada
Japan Atomic Energy Research Institute
M. Asai
Japan Atomic Energy Research Institute
H. Haba
Japan Atomic Energy Research Institute
S. Mitsuoka
Japan Atomic Energy Research Institute
K. Nishio
Japan Atomic Energy Research Institute
M. Sakama
Department of Chemistry, Tokyo Metropolitan University
Y. L. Zhao
Department of Chemistry, Tokyo Metropolitan University
lnstitute of High Energy Physics, Chinese Academy of Science
K. Sueki
Department of Chemistry, Tokyo Metropolitan University
M. Tanikawa
Department of Chemistry, The University of Tokyo
K. Takamiya
Research Reactor Institute, Kyoto University
H. Kudo
Department of Chemistry, Niigata University
H. Nakahara
Department of Chemistry, Tokyo Metropolitan University

JOURNAL FREE ACCESS

2002 Volume 3 Issue 1 Pages 63-65

DOI https://doi.org/10.14494/jnrs2000.3.63

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Abstract

In order to clarify the relationship between a mass distribution and shell structure of the fission fragments in nuclear fission, the fragment mass and the kinetic energy distributions in the proton-induced fission of plutonium isotopes, ^{239, 242, 244}Pu, were precisely measured using a double time-of-flight system. It was found that the position of the light side of the heavy asymmetric mass distributions shifts to a larger fragment mass number according to the neutron-proton ratio, N_f/Z_f, of the fissioning nucleus. The result is qualitatively explained by the change of the most probable mass number of fission fragments for Z=50 proton shell.

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