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Title: Experimental fission study using multi-nucleon transfer reactions
Authors: Nishio, Katsuhisa
Hirose, Kentaro
Léguillon, Romain
Makii, Hiroyuki
Orlandi, Riccardo
Tsukada, Kazuaki
Smallcombe, James
Chiba, Satoshi
Aritomo, Yoshihiro
Tanaka, Shouya
Ohtsuki, Tsutomu  kyouindb  KAKEN_id
Tsekhanovich, Igor
Petrache, Costel M.
Andreyev, Andrei
Author's alias: 大槻, 勤
Issue Date: 2017
Publisher: EDP Sciences
Journal title: EPJ Web of Conferences
Volume: 146
Thesis number: 04009
Abstract: It is shown that the multi-nucleon transfer reactions is a powerful tool to study fission of exotic neutron-rich actinide nuclei, which cannot be accessed by particle-capture or heavy-ion fusion reactions. In this work, multi-nucleon transfer channels of the reactions of ¹⁸O+²³²Th, ¹⁸O+²³⁸U and ¹⁸O+²⁴⁸Cm are used to study fission for various nuclei from many excited states. Identification of fissioning nuclei and of their excitation energy is performed on an event-by-event basis, through the measurement of outgoing ejectile particle in coincidence with fission fragments. Fission fragment mass distributions are measured for each transfer channel. Predominantly asymmetric fission is observed at low excitation energies for all studied cases, with a gradual increase of the symmetric mode towards higher excitation energy. The experimental distributions are found to be in general agreement with predictions of the fluctuation-dissipation model. Role of multi-chance fission in fission fragment mass distributions is discussed, where it is shown that mass-asymmetric structure remaining at high excitation energies originates from low-excited nuclei by evaporation of neutrons.
Rights: This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI(Published Version): 10.1051/epjconf/201714604009
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