TY - JOUR
T1 - Study of fission using multi-nucleon transfer reactions
AU - Nishio, Katsuhisa
AU - Hirose, Kentaro
AU - Mark, Vermeulen
AU - Makii, Hiroyuki
AU - Orlandi, Riccardo
AU - Tsukada, Kazuaki
AU - Asai, Masato
AU - Toyoshima, Atsushi
AU - Sato, Tetsuya K.
AU - Nagame, Yuichiro
AU - Chiba, Satoshi
AU - Aritomo, Yoshihiro
AU - Tanaka, Shouya
AU - Ohtsuki, Tsutomu
AU - Tsekhanovich, Igor
AU - Petrache, Costel M.
AU - Andreyev, Andrei
N1 - Funding Information:
Special thanks are due to the crew of the JAEA tandem facility for their beam operation. Present study is supported by “Compre-hensive study of delayed-neutron yields for accurate evaluation of kinetics of high-burn up reactors” and "Development of prompt-neutron measurement in fission by surrogate reaction method and evaluation of neutron-energy spectra" by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT).
Publisher Copyright:
© The Authors, published by EDP Sciences, 2017.
PY - 2017/11/22
Y1 - 2017/11/22
N2 - It is shown that multi-nucleon transfer reaction is a powerful tool to study fission of exotic neutronrich 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, 18O+248Cm, and 18O+237Np were used to measure fission-fragment mass distribution for each transfer channel. 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 is shown that mass-asymmetric structure remaining at high excitation energies originates from low-excited and less neutronrich excited nuclei due to higher-order chance fissions.
AB - It is shown that multi-nucleon transfer reaction is a powerful tool to study fission of exotic neutronrich 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, 18O+248Cm, and 18O+237Np were used to measure fission-fragment mass distribution for each transfer channel. 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 is shown that mass-asymmetric structure remaining at high excitation energies originates from low-excited and less neutronrich excited nuclei due to higher-order chance fissions.
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U2 - 10.1051/epjconf/201716300041
DO - 10.1051/epjconf/201716300041
M3 - Conference article
AN - SCOPUS:85036657038
VL - 163
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
SN - 2101-6275
M1 - 00041
T2 - FUSION 2017
Y2 - 20 February 2017 through 24 February 2017
ER -