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Nishio, Katsuhisa; Hirose, Kentaro; Lguillon, R.*; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Chiba, Satoshi*; Aritomo, Yoshihiro*; Tanaka, Shoya*; et al.
Proceedings of 6th International Conference on Fission and Properties of Neutron-rich Nuclei (ICFN-6), p.590 - 597, 2017/11
Lguillon, R.; Nishio, Katsuhisa; Hirose, Kentaro; Makii, Hiroyuki; Nishinaka, Ichiro*; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Chiba, Satoshi*; Aritomo, Yoshihiro*; et al.
Physics Letters B, 761, p.125 - 130, 2016/10
Times Cited Count:45 Percentile:92.63(Astronomy & Astrophysics)Ikeura, Hiromi*; Sekiguchi, Tetsuhiro; Baba, Yuji; Imamura, Motoyasu*; Matsubayashi, Nobuyuki*; Shimada, Hiromichi*
Surface Science, 593(1-3), p.303 - 309, 2005/11
Times Cited Count:5 Percentile:25.21(Chemistry, Physical)no abstracts in English
Katakura, Junichi
JAERI-Research 2003-004, 19 Pages, 2003/03
no abstracts in English
Haba, Hiromitsu; Kasaoka, Makoto*; Igarashi, Manabu*; Washiyama, Koshin*; Matsumura, Hiroshi*; Oura, Yasuji*; Shibata, Seiichi*; Sakamoto, Ko*; Furukawa, Michiaki*; Fujiwara, Ichiro*
Radiochimica Acta, 90(7), p.371 - 382, 2002/08
Times Cited Count:2 Percentile:16.24(Chemistry, Inorganic & Nuclear)The reaction yields of 63 radionuclides with the mass number A = 56-135 produced in the photofission of Bi by bremsstrahlung of end-point energies (E
) from 450 to 1100 MeV have been measured using a catcher foil technique. The charge distribution was well reproduced by a Gaussian function with the most probable charge (Z
) expressed by Z
= RA + S, and with the A-independent FWHME
. The charge distribution parameters R, S and FWHM
were independent of E
above 600 MeV. The weighted mean values at E
600 MeV were R = 0.421
0.001, S = 0.6
0.1 and FWHM
= 2.1
0.1 charge unit (c.u.). Based on the charge distribution parameters, the symmetric mass yield distributions with the most probable mass A
of 96
1 mass unit (m.u.) and the width FWHM
of 33
1 m.u. were also obtained. The characteristics of the charge and mass yield distributions are discussed by referring to those for
Au based on the results of calculations using PICA3/GEM.
Suzuki, Mitsuhiro; Nakamura, Hideo; Yonomoto, Taisuke; Kumamaru, Hiroshige; Anoda, Yoshinari; Murata, Hideo
JAERI-M 91-103, 156 Pages, 1991/07
no abstracts in English
; Ikezawa, Yoshio
Hoken Butsuri, 25(3), p.294 - 298, 1990/00
no abstracts in English
Arigane, Kenji
JAERI-M 87-063, 133 Pages, 1987/04
no abstracts in English
; ; ; ;
Journal of Nuclear Science and Technology, 11(11), p.510 - 515, 1974/11
Times Cited Count:0no abstracts in English
Asai, Masato
no journal, ,
New experimental results on the symmetric fission in neutron-rich transfermium nuclei are reported. Those nuclei were produced in the multi-nucleon transfer reactions with an Es target, and reaction products were mass-separated by a gas-jet coupled on-line isotope separator at the JAEA tandem accelerator facility. Spontaneous-fission fragments of those nuclei were measured with Si detectors, and fission-fragment mass and total-kinetic-energy distributions were deduced precisely. Details of the symmetric fission in neutron-rich transfermium nuclei were discussed based on the present experimental results.
Vermeulen, M. J.; Nishio, Katsuhisa; Makii, Hiroyuki; Hirose, Kentaro; Orlandi, R.; Tsukada, Kazuaki; Chiba, Satoshi*; Andreyev, A.*
no journal, ,
Nishio, Katsuhisa
no journal, ,
Asai, Masato; Kamada, Hiroki*; Shigekawa, Yudai*; Tsukada, Kazuaki; Sato, Tetsuya; Toyoshima, Atsushi; Mitsukai, Akina; Nagame, Yuichiro; Nishio, Katsuhisa; Hirose, Kentaro; et al.
no journal, ,
To clarify the fission mechanism of mass-symmetric spontaneous fissions observed around the neutron-rich Fm region, we have measured kinetic energies and mass distribution of spontaneous-fission fragments in this nuclear region precisely. The experiment was performed at the JAEA tandem accelerator facility using an on-line isotope separator (ISOL). The mass-separated Lr nuclei were implanted into thin foil, and two fragments of their spontaneous fission were coincidently measured with two Si detectors. The spontaneous fission of
Lr was found to show a narrow symmetric mass distribution. On the other hand, their total kinetic energy TKE was found to be low, which is apparently different from the high-TKE symmetric fissions observed in the Fm isotopes. This indicates that the fission mechanisms of these two symmetric fissions are different.