Fission of actinide nuclei using multi-nucleon transfer reactions

ORAL

Abstract

We are promoting a campaign to measure fission-fragment mass distributions for neutron-rich actinide nuclei populated by transfer reactions from their ground state up to an excitation energy of several tens MeV. We thus obtain the excitation energy dependence of the mass distribution. The experiment was carried out at the 20 MV JAEA tandem facility at Tokai. We report on the data obtained in the direct reaction $^{18}O+^{232}Th$. Transfer-channels and excitation energies of the fissioning nuclei were identified using silicon dE-E detectors located at forward angle. Two fission fragments were detected in coincidence using multi-wire proportional counters. Fission fragment masses were determined by kinematic consideration. We obtained the fission fragment mass distributions for 13 nuclei from actinium to uranium and some fission barrier heights.

*Present study is supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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Authors

  • Romain L\'eguillon

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Katsuhisa Nishio

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Kentaro Hirose

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Riccardo Orlandi

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Hiroyuki Makii

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Ichiro Nishinaka

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Tetsuro Ishii

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Kazuaki Tsukada

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Masato Asai

    • ASRC, Japan Atomic Energy Agency, Tokai, Japan

  • Satoshi Chiba

    • Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo, Japan

  • Tsutomu Ohtsuki

    • Research Reactor Institute, Kyoto University, Kumatori, Japan

  • Shohei Araki

    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka, Japan

  • Yukinobu Watanabe

    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka, Japan

  • Ryotaro Tatsuzawa

    • Graduate School of Engineering, Tokyo City University, Tokyo, Japan

  • Naoyuki Takaki

    • Graduate School of Engineering, Tokyo City University, Tokyo, Japan