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F+
Bi reactionNishinaka, Ichiro; Kasamatsu, Yoshitaka*; Tanikawa, Masashi*; Goto, Shinichi*; Asai, Masato
Proceedings in Radiochemistry, 1(1), p.117 - 121, 2011/09
Unexpected steep falloff of fusion cross sections has recently been observed in heavy-ion fusion reactions at deep sub-barrier energies. In this study the fusion-fission cross sections for F+Bi at sub-barrier energies were determined by a radiochemical method in order to study sub-barrier fusion hindrance. We will discuss the sub-barrier fusion hindrance in heavy-mass systems, comparing the theoretical calculations and the systematics.
UNishinaka, Ichiro; Tanikawa, Masashi*; Nagame, Yuichiro; Nakahara, Hiromichi*
European Physical Journal A, 47(1), p.1 - 8, 2011/01
Times Cited Count：18 Percentile：72.25(Physics, Nuclear)The most probable charges of secondary fragments in the 11.5 MeV proton-induced fission of U were determined from the mass yields measured by the double time-of-flight method and the fractional cumulative and independent yields measured radiochemically and reported in literature. The nuclear-charge polarization of primary fragments at scission was obtained by correcting the secondary fragment mass for neutron evaporation. The results show that the nuclear-charge polarization is determined by the minimum potential energy of nuclei at scission and that it is nearly independent not only of mass and excitation energy but also of the neutron-to-proton ratio of the fissioning nucleus.
Nishinaka, Ichiro; Tanikawa, Masashi*; Goto, Shinichi*; Nishio, Katsuhisa; Asai, Masato; Tsukada, Kazuaki; Nagame, Yuichiro; Kudo, Hisaaki*
Nuclear Physics A, 805, p.434 - 436, 2008/00
The aim of this work is to study how shell effects of fissioning nuclei and fission fragments are responsible for deformation and mass division during descent from the saddle point to scission. We studied in detail excitation energy dependence of mass and total kinetic energy distributions in the fission of 
+ 
U at incident beam energies of 10.0, 11.5 and 13.0 MeV. For the asymmetric mass division in the fission for both uranium isotopes, the obtained yield at 
132 with the spherical shell of 
= 82 increases more largely with increasing excitation energy than that at 143 with deformed shell of = 86-88. The present excitation energy dependence shows the opposite trend observed in the thermal neutron induced fission and cold fission of actinides. We will discuss the shell effects on excitation energy dependence of fragment mass and total kinetic energy distributions in fission.
Nishinaka, Ichiro; Nagame, Yuichiro; Ikezoe, Hiroshi; Tanikawa, Masashi*; Zhao, Y. L.*; Sueki, Keisuke*; Nakahara, Hiromichi
Physical Review C, 70(1), p.014609_1 - 014609_10, 2004/07
Times Cited Count：16 Percentile：66.85(Physics, Nuclear)no abstracts in English
Goto, Shinichi*; Kaji, D.*; Nishinaka, Ichiro; Nagame, Yuichiro; Ichikawa, Shinichi; Tsukada, Kazuaki; Asai, Masato; Haba, Hiromitsu; Mitsuoka, Shinichi; Nishio, Katsuhisa; et al.
Journal of Radioanalytical and Nuclear Chemistry, 255(1), p.73 - 76, 2003/01
Times Cited Count：0 Percentile：0.01(Chemistry, Analytical)no abstracts in English
Zhao, Y. L.*; Nishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Sueki, Keisuke*; Goto, Shinichi*; Tanikawa, Masashi*; Nakahara, Hiromichi*
Journal of Radioanalytical and Nuclear Chemistry, 255(1), p.67 - 72, 2003/01
Times Cited Count：4 Percentile：31.64(Chemistry, Analytical)no abstracts in English
Zhao, Y. L.*; Nagame, Yuichiro; Nishinaka, Ichiro; Tsukada, Kazuaki; Sueki, Keisuke*; Nakahara, Hiromichi*; Goto, Shinichi*; Tanikawa, Masashi*
Journal of Nuclear Science and Technology, 39(Suppl.3), p.30 - 33, 2002/11
no abstracts in English
Zhao, Y. L.*; Nishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Sueki, Keisuke*; Tanikawa, Masashi*; Goto, Shinichi*; Nakahara, Hiromichi*
Journal of Nuclear and Radiochemical Sciences, 3(1), p.103 - 107, 2002/06
no abstracts in English
Nagame, Yuichiro; Zhao, Y.*; Nishinaka, Ichiro; Goto, Shinichi*; Kaji, D.*; Tanikawa, Masashi*; Tsukada, Kazuaki; Asai, Masato; Haba, Hiromitsu; Sakama, Minoru*; et al.
Radiochimica Acta, 89(11-12), p.681 - 688, 2002/02
Times Cited Count：3 Percentile：27.1(Chemistry, Inorganic & Nuclear)no abstracts in English
Nagame, Yuichiro; Zhao, Y.*; Nishinaka, Ichiro; Goto, Shinichi; Tanikawa, Masashi*; Tsukada, Kazuaki; Asai, Masato; Haba, Hiromitsu; Sakama, Minoru; Ichikawa, Shinichi; et al.
Heavy Ion Physics, 13(1-3), p.121 - 131, 2001/05
Times Cited Count：0 Percentile：0.01(Physics, Nuclear)no abstracts in English
130 in two mode fissionNishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Ichikawa, Shinichi; Ikezoe, Hiroshi; Tanikawa, Masashi*; Zhao, Y.*; Sueki, Keisuke*; Nakahara, Hiromichi*
Proceedings of 2nd International Conference on Fission and Neutron-rich Nuclei, p.494 - 496, 2000/03
no abstracts in English
Zhao, Y. L.*; Nishinaka, Ichiro; Nagame, Yuichiro; Tanikawa, Masashi*; Tsukada, Kazuaki; Ichikawa, Shinichi; Sueki, Keisuke*; Oura, Yasutsugu*; Ikezoe, Hiroshi; Mitsuoka, Shinichi; et al.
Physical Review Letters, 82(17), p.3408 - 3411, 1999/04
Times Cited Count：32 Percentile：79.83(Physics, Multidisciplinary)no abstracts in English
Nagame, Yuichiro; Zhao, Y.*; Nishinaka, Ichiro; Otsuki, Tsutomu*; Tanikawa, Masashi*; Tsukada, Kazuaki; Sueki, Keisuke*; Ichikawa, Shinichi; Nakahara, Hiromichi*
1st International Conference on the Chemistry and Physics of the Transactinide Elements; Extended Abstracts, 4 Pages, 1999/00
no abstracts in English
Nagame, Yuichiro; Nishinaka, Ichiro; Zhao, Y. L.*; Tsukada, Kazuaki; Ichikawa, Shinichi; Ikezoe, Hiroshi; Tanikawa, Masashi*; Otsuki, Tsutomu*; Oura, Yasutsugu*; Sueki, Keisuke*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 239(1), p.97 - 101, 1999/00
Times Cited Count：4 Percentile：34.81(Chemistry, Analytical)no abstracts in English
Zhao, Y.*; Tanikawa, Masashi*; Sueki, Keisuke*; Nishinaka, Ichiro; Tsukada, Kazuaki; Oura, Yasutsugu*; Nagame, Yuichiro; Nakahara, Hiromichi*
Radiochimica Acta, 86(3-4), p.79 - 88, 1999/00
no abstracts in English
Zhao, Y.*; Nishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Tanikawa, Masashi*; Sueki, Keisuke*; Oura, Yasutsugu*; Ichikawa, Shinichi; Ikezoe, Hiroshi; Otsuki, Tsutomu*; et al.
Journal of Alloys and Compounds, 271-273, p.327 - 330, 1998/00
Times Cited Count：6 Percentile：46.75(Chemistry, Physical)no abstracts in English
Nishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Ikezoe, Hiroshi; Sueki, Keisuke*; Nakahara, Hiromichi*; Tanikawa, Masashi*; Otsuki, Tsutomu*
Physical Review C, 56(2), p.891 - 899, 1997/08
Times Cited Count：20 Percentile：72.02(Physics, Nuclear)no abstracts in English
-particles in the 
O + 
Pu reactionNishinaka, Ichiro; Tanikawa, Masashi*; Nagame, Yuichiro; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Ichikawa, Takatoshi*
no journal, ,
no abstracts in English
-particle emission in the O + Pu reactionNishinaka, Ichiro; Tanikawa, Masashi*; Nagame, Yuichiro; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Ichikawa, Takatoshi*
no journal, ,
no abstracts in English
UNishinaka, Ichiro; Tanikawa, Masashi*; Nagame, Yuichiro; Nakahara, Hiromichi*
no journal, ,
Characteristics of neutron multiplicity and nuclear charge polarization have been studied in the 11.5 MeV proton-induced fission of U. Fragment mass and the average neutron multiplicity were measured by a double time-of-flight method. The most probable charges of secondary fragments were evaluated from fractional cumulative and mass yields. The nuclear charge polarization of primary fragments at scission was obtained by correcting the most probable charge of secondary fragments for neutron evaporation. The results show that the nuclear charge polarization at scission is associated with the liquid drop properties of nuclei and the proton shell effect with 
= 50 of heavy fragments.
