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Journal Articles

Search for $$alpha$$ decay of $$^{104}$$Te with a novel recoil-decay scintillation detector

Xiao, Y.*; Go, S.*; Grzywacz, R.*; Orlandi, R.; Andreyev, A. N.; Asai, Masato; Bentley, M. A.*; de Angelis, G.*; Gross, C. J.*; Hausladen, P.*; et al.

Physical Review C, 100(3), p.034315_1 - 034315_8, 2019/09

 Times Cited Count:4 Percentile:16.29(Physics, Nuclear)

Journal Articles

Role of multichance fission in the description of fission-fragment mass distributions at high energies

Hirose, Kentaro; Nishio, Katsuhisa; Tanaka, Shoya*; L$'e$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:26 Percentile:7.98(Physics, Multidisciplinary)

Fission-fragment mass distributions were measured for $$^{237-240}$$U, $$^{239-242}$$Np and $$^{241-244}$$Pu populated in the excitation-energy range from 10 to 60 MeV by multi-nucleon transfer channels in the reaction $$^{18}$$O + $$^{238}$$U at the JAEA tandem facility. Among them, the data for $$^{240}$$U and $$^{240,241,242}$$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.

Journal Articles

Study of fission using multi-nucleon transfer reactions

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, 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

Journal Articles

Experimental fission study using multi-nucleon transfer reactions

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, R.*; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Smallcombe, J.*; Chiba, Satoshi*; Aritomo, Yoshihiro*; Tanaka, Shoya*; et al.

EPJ Web of Conferences, 146, p.04009_1 - 04009_6, 2017/09

 Times Cited Count:2 Percentile:9.6

Journal Articles

Fission fragments mass distributions of nuclei populated by the multinucleon transfer channels of the $$^{18}$$O + $$^{232}$$Th reaction

L$'e$guillon, 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:27 Percentile:6.1(Astronomy & Astrophysics)

Oral presentation

Mass asymmetric fission of a nucleus produced in the $$^{7}$$Li + $$^{186}$$W reaction

Tamura, Nobuyuki; Hirose, Kentaro; Nishio, Katsuhisa; Nishinaka, Ichiro; Makii, Hiroyuki; Orlandi, R.; L$'e$guillon, R.; Smallcombe, J.; Andreyev, A.; Otsuki, Tsutomu*; et al.

no journal, , 

no abstracts in English

Oral presentation

Induced fission studies of Z $$<$$ 82 nuclei at the JAEA Tandem Facility

Smallcombe, J.; Nishio, Katsuhisa; Hirose, Kentaro; Nishinaka, Ichiro; Makii, Hiroyuki; Orlandi, R.; Tamura, Nobuyuki*; Goto, Shinichi*; Otsuki, Tsutomu*; Andreyev, A.*; et al.

no journal, , 

Oral presentation

Study for fission using multi-nucleon transfer reaction

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, R.; Makii, Hiroyuki; Nishinaka, Ichiro; Orlandi, R.; Smallcombe, J.; Chiba, Satoshi*; Araki, Shohei*; Watanabe, Yukinobu*; et al.

no journal, , 

Oral presentation

Fission study of actinide nuclei using multi-nucleon transfer reaction

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, R.; Makii, Hiroyuki; Nishinaka, Ichiro; Orlandi, R.; Smallcombe, J.; Chiba, Satoshi*; Araki, Shohei*; Watanabe, Yukinobu*; et al.

no journal, , 

Oral presentation

Measurements of prompt fission $$gamma$$-rays from the reaction $$^{235}$$U ($$n_{th},f$$)

Makii, Hiroyuki; Nishio, Katsuhisa; Nishinaka, Ichiro; Hirose, Kentaro; Orlandi, R.; Smallcombe, J.; L$'e$guillon, R.; Sekimoto, Shun*; Takamiya, Koichi*; Otsuki, Tsutomu*

no journal, , 

The Japanese government has a plan to remove the melted reactor fuel for the full deconstruction of Fukushima I Nuclear Power Plants, which have been seriously damaged in the Great East Japan Earthquake. The removal of the fuel must be carried out without reaching the criticality of the fuel. However, it is quite difficult to detect prompt neutrons accompanied by fission to monitor the increased fission rate due to the background $$gamma$$-rays from the fission products in the fuel. On the other hand, the spontaneous fission of $$^{252}$$Cf shows a high energy $$gamma$$-ray component around $$E_{gamma}$$ = 14 MeV, which is significantly larger than that for the background $$gamma$$-rays from the fission products. We are proposing to develop a system based on the use of the high energy $$gamma$$-rays accompanied by fission. In order to design the system, it is essential to know the spectrum of prompt fission $$gamma$$-rays up to more than 8 MeV for thermal neutron-induced fission of $$^{235}$$U. However, no data are available in the energy range larger than 7 MeV. This prompted us to make a new measurement to extend the known prompt $$gamma$$ ray energy spectrum up to 20 MeV. In this contribution, we will present the results of a test experiment to know the measuring condition such as background $$gamma$$-ray yield and spectrum.

Oral presentation

Measurement of high-energy $$gamma$$-rays accompanied by fission for a new detector to monitor subcriticality

Nishio, Katsuhisa; Makii, Hiroyuki; Hirose, Kentaro; Nishinaka, Ichiro; Orlandi, R.; Smallcombe, J.; Otsuki, Tsutomu*; Sekimoto, Shun*; Takamiya, Koichi*

no journal, , 

no abstracts in English

Oral presentation

Fission study using multi-nucleon transfer reactions

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, R.; Makii, Hiroyuki; Orlandi, R.; Nishinaka, Ichiro; Smallcombe, J.; Chiba, Satoshi*; Araki, Shohei*; Watanabe, Yukinobu*; et al.

no journal, , 

Oral presentation

Fission study by multi-nucleon transfer reaction at JAEA

Hirose, Kentaro; Nishio, Katsuhisa; L$'e$guillon, R.; Makii, Hiroyuki; Nishinaka, Ichiro; Orlandi, R.; Smallcombe, J.; Ishii, Tetsuro; Tsukada, Kazuaki; Asai, Masato; et al.

no journal, , 

Oral presentation

Measurement of nucleon-transfer fission in $$^{18}$$O + $$^{248}$$Cm reaction

Hirose, Kentaro; Nishio, Katsuhisa; L$'e$guillon, R.; Smallcombe, J.; Nishinaka, Ichiro; Makii, Hiroyuki; Orlandi, R.; Tsukada, Kazuaki; Chiba, Satoshi*; Otsuki, Tsutomu*; et al.

no journal, , 

no abstracts in English

Oral presentation

Study for fission using multi-nucleon transfer reaction

Nishio, Katsuhisa; Hirose, Kentaro; L$'e$guillon, R.; Orlandi, R.; Nishinaka, Ichiro; Smallcombe, J.*; Chiba, Satoshi; Araki, Shohei*; Watanabe, Yukinobu*; Tatsuzawa, Ryotaro*; et al.

no journal, , 

Oral presentation

Surrogate reactions for neutron-induced fission reaction and capture reaction by heavy ion transfer reactions

Makii, Hiroyuki; Nishio, Katsuhisa; Hirose, Kentaro; Orlandi, R.; Yan, S. Q.*; L$'e$guillon, 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$$_{3}$$(Ce) spectrometers to measure the $$gamma$$ rays from the populated compound nuclei. Both setups contain a Si $$Delta$$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.

Oral presentation

Fission yield measurement using multi-nucleon transfer reactions

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, , 

17 (Records 1-17 displayed on this page)
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