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O+
Np reactionVermeulen, M. J.; Nishio, Katsuhisa; Hirose, Kentaro; Kean, K. R.; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Tsekhanovich, I.*; Andreyev, A. N.; Ishizaki, Shoma*; et al.
Physical Review C, 102(5), p.054610_1 - 054610_11, 2020/11
Times Cited Count：6 Percentile：53.35(Physics, Nuclear)Kean, K. R.; Nishio, Katsuhisa; Hirose, Kentaro; Vermeulen, M. J.; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Andreyev, A. N.; Tsekhanovich, I.*; Chiba, Satoshi*
Physical Review C, 100(1), p.014611_1 - 014611_6, 2019/07
Times Cited Count：4 Percentile：37.18(Physics, Nuclear)
PtTsekhanovich, I.*; Andreyev, A. N.; Nishio, Katsuhisa; Denis-Petit, D.*; Hirose, Kentaro; Makii, Hiroyuki; Matheson, Z.*; Morimoto, Koji*; Morita, Kosuke*; Nazarewicz, W.*; et al.
Physics Letters B, 790, p.583 - 588, 2019/03
Times Cited Count：39 Percentile：95.05(Astronomy & Astrophysics)Hirose, Kentaro; Nishio, Katsuhisa; Tanaka, Shoya*; L
guillon, R.*; Makii, Hiroyuki; Nishinaka, Ichiro*; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Vermeulen, M. J.; et al.
Physical Review Letters, 119(22), p.222501_1 - 222501_6, 2017/12
Times Cited Count：59 Percentile：91.80(Physics, Multidisciplinary)Fission-fragment mass distributions were measured for 
U, 
Np and 
Pu populated in the excitation-energy range from 10 to 60 MeV by multi-nucleon transfer channels in the reaction O + 
U at the JAEA tandem facility. Among them, the data for 
U and 
Np were observed for the first time. It was found that the mass distributions for all the studied nuclides maintain a double-humped shape up to the highest measured energy in contrast to expectations of predominantly symmetric fission due to the washing out of nuclear shell effects. From a comparison with the dynamical calculation based on the fluctuation-dissipation model, this behavior of the mass distributions was unambiguously attributed to the effect of multi-chance fission.
Nishio, Katsuhisa; Hirose, Kentaro; Vermeulen, M. J.; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Asai, Masato; Toyoshima, Atsushi; Sato, Tetsuya; Nagame, Yuichiro; et al.
EPJ Web of Conferences, 163, p.00041_1 - 00041_6, 2017/11
Times Cited Count：1 Percentile：59.33(Nuclear Science & Technology)
Am at neutron energies below fission thresholdHirose, Kentaro; Nishio, Katsuhisa; Makii, Hiroyuki; Nishinaka, Ichiro*; Ota, Shuya*; Nagayama, Tatsuro*; Tamura, Nobuyuki*; Goto, Shinichi*; Andreyev, A. N.; Vermeulen, M. J.; et al.
Nuclear Instruments and Methods in Physics Research A, 856, p.133 - 138, 2017/06
Times Cited Count：5 Percentile：41.16(Instruments & Instrumentation)Bottoni, S.*; Leoni, S.*; Fornal, B.*; Raabe, R.*; Rusek, K.*; Benzoni, G.*; Bracco, A.*; Crespi, F. C. L.*; Morales, A. I.*; Bednarczyk, P.*; et al.
Physical Review C, 92(2), p.024322_1 - 024322_8, 2015/08
Times Cited Count：22 Percentile：78.91(Physics, Nuclear)
factor of the first excited 
state in 
ZnIllana, A.*; Jungclaus, A.*; Orlandi, R.; Perea, A.*; Bauer, C.*; Briz, J. A.*; Egido, J. L.*; Gernh
user, R.*; Leske, J.*; M
cher, D.*; et al.
Physical Review C, 89(5), p.054316_1 - 054316_11, 2014/05
Times Cited Count：11 Percentile：58.95(Physics, Nuclear)
=20 shell in 
Al investigated through the ground-state electric quadrupole momentShimada, Kenji*; Ueno, Hideki*; Neyens, G.*; Asahi, Koichiro*; Balabanski, D. L.*; Daugas, J. M.*; Depuydt, M.*; De Rydt, M.*; Gaudefroy, L.*; Grvy, S.*; et al.
Physics Letters B, 714(2-5), p.246 - 250, 2012/08
Times Cited Count：7 Percentile：40.35(Astronomy & Astrophysics)no abstracts in English
Al and determination of the effective proton charge in the sd-shellDe Rydt, M.*; Neyens, G.*; Asahi, Koichiro*; Balabanski, D. L.*; Daugas, J. M.*; Depuydt, M.*; Gaudefroy, L.*; Grvy, S.*; Hasama, Yuka*; Ichikawa, Yuichi*; et al.
Physics Letters B, 678(4), p.344 - 349, 2009/07
Times Cited Count：17 Percentile：69.35(Astronomy & Astrophysics)no abstracts in English
factor of the exotic 
isotope 
Al; Probing the 
and 
shell gaps at the border of the "island of inversion"Himpe, P.*; Neyens, G.*; Balabanski, D. L.*; Blier, G.*; Daugas, J. M.*; de Oliveira Santos, F.*; De Rydt, M.*; Flanagan, K. T.*; Matea, I.*; Morel, P.*; et al.
Physics Letters B, 658(5), p.203 - 208, 2008/01
Times Cited Count：44 Percentile：88.72(Astronomy & Astrophysics)An exotic nucleus Al was produced at GANIL, and its absolute value of the factor was measured for the first time. Based on the value and the 
decay branching, the ground state of Al is most liekly to be 
. By comparing the shell model calculation for the factor, it turns out that the ground state of Al cannot be described unless a significant excitation from the 
to 
shells is taken into account. Thus, the nucleus belongs to the so-called "island of inversion." We performed the Monte Carlo shell model calculation, showing that this factor is sensitive not only to the gap but also the gap.
Es targetAsai, Masato; Tsukada, Kazuaki; Hirose, Kentaro; Toyoshima, Atsushi*; Tomitsuka, Tomohiro*; Chiera, N. M.*; Ito, Yuta; Makii, Hiroyuki; Nagame, Yuichiro*; Nishio, Katsuhisa; et al.
no journal, ,
Neutron-rich fermium isotopes 
Fm and 
Fm and lawrencium isotope 
Lr were produced in the multinucleon transfer reaction on Es target with heavy-ion beam and in the heavy-ion fusion reaction on 
Cm target with 
N beam, respectively. Reaction products were mass-separated with an on-line isotope separator (ISOL), and spontaneous fission (SF) of these isotopes were measured. It was found that the mass distribution of the SF of Fm was asymmetric, while that of Fm was sharp symmetric, which confirmed the previous experimental results. On the other hand, the SF of Lr seemed to contain both symmetric and asymmetric mass distributions. On the basis of the present results of the mass and total kinetic energy distributions, we discussed the mechanism of fission for these isotopes.
Es targetAsai, Masato; Tsukada, Kazuaki; Hirose, Kentaro; Toyoshima, Atsushi; Tomitsuka, Tomohiro; Chiera, N. M.; Ito, Yuta; Makii, Hiroyuki; Nagame, Yuichiro; Nishio, Katsuhisa; et al.
no journal, ,
Spontaneous fissions of neutron-rich heavy actinide isotopes Fm, Fm, and Lr have been measured at the JAEA Tandem accelerator facility. Fm and Fm were produced in a multinucleon transfer reaction with an O beam and an extremely rare Es target with a half-life of 276 days. Reaction products were mass-separated with an on-line isotope separator (ISOL). A transition between the typical asymmetric mass distribution and a very sharp symmetric one was clearly observed between Fm and Fm, while the spontaneous fission of Lr was found to exhibit mixture of three different fission modes.
O+Np reactionNishio, Katsuhisa; Vermeulen, M. J.*; Hirose, Kentaro; Kean, K. R.*; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Tsekhanovich, I.*; Andreyev, A. N.; Ishizaki, Shoma*; et al.
no journal, ,
no abstracts in English
O+Np reactionNishio, Katsuhisa; Vermeulen, M. J.*; Hirose, Kentaro; Kean, K. R.*; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Tsekhanovich, I.*; Andreyev, A. N.; Ishizaki, Shoma*; et al.
no journal, ,
no abstracts in English
Hirose, Kentaro; Nishio, Katsuhisa; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Asai, Masato; Sato, Tetsuya; Ito, Yuta; Suzaki, Fumi; Nagame, Yuichiro*; et al.
no journal, ,
A specific phenomenon was found in fission-fragment mass distributions for nuclides around A=258 by spontaneous fission measurements. Fm256 splits into light and heavy fragments, like uranium isotopes, making two peaks in their mass distribution, whereas a sharp single peak was found in that of Fm258 which has only two more neutrons. In order to study such a specific phenomenon more widely, we performed an experiment of the multinucleon transfer fission in the O18+Es254 reaction at JAEA Tokai tandem accelerator facility.
Makii, Hiroyuki; Nishio, Katsuhisa; Hirose, Kentaro; Orlandi, R.; Yan, S. Q.*; Lguillon, R.; Smallcombe, J.*; Vermeulen, M. J.; Nishinaka, Ichiro*; Tsukada, Kazuaki; et al.
no journal, ,
A project of the fission data measurement as well as the measurement of the neutron capture cross sections, using a surrogate method based on multi-nucleon transfer reactions, is running at JAEA. We have constructed appatus consists of a fission setup including four position-sensitive multi-wire proportional counters (MWPCs) to detect fission fragments and a capture setup containing two anti-Compton LaBr
(Ce) spectrometers to measure the 
rays from the populated compound nuclei. Both setups contain a Si 
E-E detector to detect outgoing projectile-like particles by which we can identify the populated compound nuclei. We also placed 33 scintillators around the fission setup to detect fission neutrons in coincidence with the fission fragments. The measurements was carried out at the JAEA-Tokai tandem accelerator facility. In this contribution, we will present our results on neutron-induced fission and neutron capture cross sections by using the surrogate method.
Es targetAsai, Masato; Tsukada, Kazuaki; Hirose, Kentaro; Toyoshima, Atsushi; Tomitsuka, Tomohiro; Chiera, N. M.; Ito, Yuta; Makii, Hiroyuki; Nagame, Yuichiro; Nishio, Katsuhisa; et al.
no journal, ,
Spontaneous fissions of Fm, Fm, and Lr have been measured using an Es target at the JAEA Tandem Accelerator Facility. These three nuclei show different fission properties: the asymmetric fission, the high total-kinetic-energy (TKE) symmetric fission, and the low TKE symmetric fission, and the mechanisms of these three fissions should be very different. It is of great interest to elucidate how these differences occur. We have produced 
Fm in multinucleon-transfer reactions with a Es target and O projectiles, and produced Lr in the Cm(N,4n) fusion-evaporation reaction. The reaction products were mass-separated with a gas-jet-coupled on-line isotope separator, and were delivered into a rotating wheel alpha- and fission-fragment detection system. By comparing the mass and TKE distributions deduced from the present experimental data, we will discuss the differences in fission mechanism among Fm, Fm, and Lr.
Hirose, Kentaro; Nishio, Katsuhisa; Tanaka, Shoya*; Leguillon, R.*; Makii, Hiroyuki; Nishinaka, Ichiro*; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Vermeulen, M. J.*; et al.
no journal, ,
Vermeulen, M. J.; Nishio, Katsuhisa; Makii, Hiroyuki; Hirose, Kentaro; Orlandi, R.; Tsukada, Kazuaki; Chiba, Satoshi*; Andreyev, A.*
no journal, ,
