|
|||||
|
|
Bimodal fission in binary and ternary spontaneous fission of 252Cf |
|
| Authors: | D. Fong J. H. Hamilton A. V. Ramayya J. K. Hwang C. Goodin K. Li J. Kormicki J. O. Rasmussen Y. X. Luo S. C. Wu I. Y. Lee A. V. Daniel G. M. Ter-Akopian G. S. Popeko A. S. Fomichev A. M. Rodin Yu. Ts. Oganessian M. Jandel J. Kliman L. Krupa J. D. Cole M. A. Stoyer R. Donangelo W. C. Ma |
| Affiliation: | (1) Department of Physics, Vanderbilt University, Nashville, USA;(2) Lawrence Berkeley National Laboratory, USA;(3) Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia;(4) Department of Nuclear Physics, Slovak Academy of Sciences, Bralislava, Slovak Republic;(5) Idaho National Engineering and Environmental Laboratory, Idaho Falls, USA;(6) Lawrence Livermore National Laboratory, USA;(7) Instituto de Fiscia, Universidade Federal do Rio de Janeiro, Brazil;(8) Department of Physics, Mississippi State University, USA |
| Abstract: | The hot bimodal fission of 252Cf is reexamined with new high-statistics data. We constructed a γ-γ-γ coincidence cube for binary fission and LCP-gated γ-γ matrix for ternary fission. By identifying the secondary fission fragments from their γ-ray transitions, we measured the yields for various fission splits. The normal neutron yield distribution is found to be Gaussian for Xe-Ru. However, the binary fission split of Ba-Mo is found to exhibit a bimodal neutron distribution with the “hot mode” corresponding to ≈3.1% of the total yield. In α ternary fission, the first measurements of yields for specific fission splits are presented. The Te-α-Ru and Xe-α-Mo neutron yields fit well with a single mode, but the Ba-α-Zr split shows evidence for an enhanced hot mode with an intensity of ≈13.8% of the normal mode. The text was submitted by the authors in English. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |