Symmetric and Asymmetric Scission Properties: Identical Shape Elongations of Fissioning Nuclei

Y. L. Zhao; I. Nishinaka; Y. Nagame; M. Tanikawa; K. Tsukada; S. Ichikawa; K. Sueki; Y. Oura; H. Ikezoe; S. Mitsuoka; H. Kudo; T. Ohtsuki; H. Nakahara

doi:10.1103/PhysRevLett.82.3408

Symmetric and Asymmetric Scission Properties: Identical Shape Elongations of Fissioning Nuclei

Y. L. Zhao, I. Nishinaka, Y. Nagame, M. Tanikawa, K. Tsukada, S. Ichikawa, K. Sueki, Y. Oura, H. Ikezoe, S. Mitsuoka, H. Kudo, T. Ohtsuki, and H. Nakahara

Phys. Rev. Lett. 82, 3408 – Published 26 April 1999

Abstract

The shape elongation $β$ of a fissioning nucleus (of mass $A_{f}$ ) undergoing mass-symmetric and mass-asymmetric deformation is experimentally determined. The results indicate that, either for the mass-symmetric or for the mass-asymmetric deformation, the value of shape elongation is nearly independent of $A_{f}$ and temperature. Three types of shape elongations are observed: The liquid drop property governed mass-symmetric deformation with $β \sim 1.65$ ; the mass-asymmetric deformation with $β \sim 1.53$ ; and the shell influenced mass-symmetric deformation with $β \sim 1.43$ .

Received 18 August 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.3408

Authors & Affiliations

Y. L. Zhao^1,2, I. Nishinaka², Y. Nagame², M. Tanikawa³, K. Tsukada², S. Ichikawa², K. Sueki¹, Y. Oura¹, H. Ikezoe², S. Mitsuoka², H. Kudo⁴, T. Ohtsuki⁵, and H. Nakahara¹

¹Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
²Advanced Science Research Center, Japan Atomic Energy Research Institute, Ibaraki 319-1195, Japan
³Department of Chemistry, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
⁴Department of Chemistry, Niigata University, Niigata 950-21, Japan
⁵Laboratory of Nuclear Science, Tohoku University, Taihaku-ku, Sendai 982, Japan