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

Hirose, Kentaro; Nishio, Katsuhisa; Tanaka, Shoya*; Lguillon, 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

https://doi.org/10.1103/PhysRevLett.119.222501

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.

Recent progress in the energy recovery linac project in Japan

Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.

Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05

http://accelconf.web.cern.ch/AccelConf/IPAC10/papers/tupe091.pdf

Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.

Creep damage evaluation of Mod. 9Cr-1Mo steel by an electromagnetic nondestructive method focused on rapid magnetization process

Shibuya, Kentaro*; Uchimoto, Tetsuya*; Takagi, Toshiyuki*; Takaya, Shigeru

no journal, , 

Magnetic property of aged samples and creep rupture samples of mod. 9Cr-1Mo steel were measured by a nonlinear eddy current method and a magnetic Kerr effect method. Concerning the creep rupture samples, it was found that the equivalent remanent magnetization measured by the nonlinear eddy current method and that measured by the magnetic Kerr effect method are different. This difference may be introduced by change in precipitation of MX carbonnitride and dislocation.

Fission study of actinide nuclei using multi-nucleon transfer reactions

Lguillon, R.; Nishio, Katsuhisa; Hirose, Kentaro; Orlandi, R.; Makii, Hiroyuki; Nishinaka, Ichiro; Ishii, Tetsuro; Tsukada, Kazuaki; Asai, Masato; Chiba, Satoshi*; et al.

no journal, , 

Fission study of actinide nuclei using multi-nucleon transfer reaction

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

no journal, , 

Fission study by multi-nucleon transfer reaction at JAEA

Hirose, Kentaro; Nishio, Katsuhisa; Lguillon, R.; Makii, Hiroyuki; Nishinaka, Ichiro; Orlandi, R.; Smallcombe, J.; Ishii, Tetsuro; Tsukada, Kazuaki; Asai, Masato; et al.

no journal, , 

Study for fission using multi-nucleon transfer reaction

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

no journal, , 

Warming-induced enhancement of soil heterotrophic respiration is linearly increased by the current year's litterfall supply in a cool-temperate forested peatland

Takagi, Kentaro*; Liang, N.*; Aguilos, M.*; Teramoto, Munemasa*; Kondo, Toshiaki*; Koarashi, Jun; Atarashi-Andoh, Mariko

no journal, , 

What kind of effect does warming have on soil organic carbon?

Koarashi, Jun; Atarashi-Andoh, Mariko; Takagi, Kentaro*; Kondo, Toshiaki*; Teramoto, Munemasa*; Nagano, Hirohiko; Kokubu, Yoko; Takagi, Masahiro*; Ishida, Sachinobu*; Hiradate, Shuntaro*; et al.

no journal, , 

no abstracts in English

Exploring factors affecting the warming-induced variation in soil respiration by genetic analysis

Kondo, Toshiaki*; Teramoto, Munemasa*; Takagi, Kentaro*; Koarashi, Jun; Atarashi-Andoh, Mariko; Takagi, Masahiro*; Ishida, Sachinobu*; Liang, N.*

no journal, , 

no abstracts in English