EPJ Web of Conferences (Jan 2018)

Study of fission using multi-nucleon transfer reactions

  • Nishio Katsuhisa,
  • Hirose Kentaro,
  • Vermeulen Mark,
  • Makii Hiroyuki,
  • Orlandi Riccardo,
  • Tsukada Kazuaki,
  • Asai Masato,
  • Toyoshima Atsushi,
  • Sato Tetsuya K.,
  • Nagame Yuichiro,
  • Chiba Satoshi,
  • Aritomo Yoshihiro,
  • Tanaka Shouya,
  • Ohtsuki Tsutomu,
  • Tsekhanovich Igor,
  • Petrache Costel M.,
  • Andreyev Andrei

DOI
https://doi.org/10.1051/epjconf/201816900013
Journal volume & issue
Vol. 169
p. 00013

Abstract

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Multi-nucleon transfer channels of the reactions of 18O+232Th, 18O+238U, 18O+248Cm were used to measure fission-fragment mass distribution for various nuclides and their excitation energy dependence. Predominantly asymmetric fission is observed at low excitation energies for all the studied cases, with an increase of the symmetric fission towards high excitation energies. Experimental data are compared with predictions of the fluctuation-dissipation model, where effects of multi-chance fission (neutron evaporation prior to fission) was introduced. It was shown that a reliable understanding of the observed fission fragment mass distributions can be obtained only invoking multi-chance fissions.