Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
= 32 shell closure below calcium; Low-lying structure of 
ArCort
s, M. L.*; Rodriguez, W.*; Doornenbal, P.*; Obertelli, A.*; Holt, J. D.*; Menndez, J.*; Ogata, Kazuyuki*; Schwenk, A.*; Shimizu, Noritaka*; Simonis, J.*; et al.
Physical Review C, 102(6), p.064320_1 - 064320_9, 2020/12
Times Cited Count：11 Percentile：73.66(Physics, Nuclear)Low-lying excited states in the = 32 isotope Ar were investigated by in-beam 
-ray spectroscopy following proton- and neutron-knockout, multinucleon removal, and proton inelastic scattering at the RIKEN Radioactive Isotope Beam Factory. The energies of the two previously reported transitions have been confirmed, and five additional states are presented for the first time, including a candidate for a 3
state. The level scheme built using coincidences was compared to shell-model calculations in the 
model space and to 
predictions based on chiral two- and three-nucleon interactions. Theoretical proton- and neutron-knockout cross sections suggest that two of the new transitions correspond to 2
states, while the previously proposed 4
state could also correspond to a 2 state.
TEM observation of growth process of zirconium hydride in zircaloy-4 during hydrogen ion implantationShinohara, Yasunari*; Abe, Hiroaki*; Iwai, Takeo*; Sekimura, Naoto*; Kido, Toshiya*; Yamamoto, Hiroyuki; Taguchi, Tomitsugu
Journal of Nuclear Science and Technology, 46(6), p.564 - 571, 2009/06
Times Cited Count：30 Percentile：87.31(Nuclear Science & Technology) observation during hydrogen ion implantation was performed with a TEM installed in an ion accelerator to investigate the growth process of Zr hydride in Zicaloy-4. To clarify the effect of radiation damage, some samples were irradiated with 4 MeV Ni
ions prior to hydrogen implantation. Growth processes of Zr hydrides accompanying the formation of dislocations were observed. The crystallographic relationship between the Zr matrix and Zr hydrides was identical with that found in previous studies: inter- and intragranular hydrides exhibiting a tendency to grow in the 
11
0
direction. This growth can be attributed to a shear mechanism. In specimens preirradiated with Ni ions, the growth rate of hydrides was suppressed, but the growth direction was not affected by radiation defects. It was also confirmed that the black spots induced by Ni ion irradiation grew during hydrogen ion implantation, suggesting the formation of hydrides at the defects.
Inoue, Masaki*; Iwai, Takashi; Arai, Yasuo; Asaga, Takeo*
Proceedings of GLOBAL2003 Atoms for Prosperity; Updating Eisenhower's Global Vision for Nuclear Energy (CD-ROM), p.1694 - 1703, 2003/11
no abstracts in English
; Iwai, Takashi*; Arai, Yasuo*; Asaka, Takeo
Global 2003; International Conference on Atoms for Prosperity: Upda, 1694 Pages, 2003/00
Under the collaboration between JNC and JAERI, two uranium-plutonium mixed nitride fuel pins, whose smear densities were varied by fuel-to-cladding gap sizes, were irradiated in the experimental fast reactor JOYO. Linear heat rate, cladding mid-wall temperature, and burnup in peak were 75 kW/m, 906K, and 4.3 %FIMA, respectively. In order to evaluate nitride fuels for high burnup capability, the effect of fuel swelling behavior on irradiation performance was investigated. The larger smear density induced the greater cladding diameter increments. The wider gap size resulted in the more anisotropic deformations. Threshold temperature of fuel swelling was studied by thermal analysis using radial porosity and xenon retention profiles. To attain higher burnup, experimental results indicate that maximum fuel temperatures should be preferably lower than threshold temperatures of fuel swelling and that the detrimental effects of fuel pellet relocations need to be suppressed and accommodated.
Tanigawa, Hiroyasu; Ando, Masami; Kato, Yudai*; Hirose, Takanori*; Sakasegawa, Hideo*; Jitsukawa, Shiro; Koyama, Akira*; Iwai, Takeo*
Journal of Nuclear Materials, 297(3), p.279 - 284, 2001/09
Times Cited Count：34 Percentile：89.95(Materials Science, Multidisciplinary)no abstracts in English
Tanigawa, Hiroyasu; Jitsukawa, Shiro; Hishinuma, Akimichi; Ando, Masami*; Kato, Yudai*; Koyama, Akira*; Iwai, Takeo*
Journal of Nuclear Materials, 283-287(Part.1), p.470 - 473, 2000/12
Times Cited Count：21 Percentile：77.56(Materials Science, Multidisciplinary)no abstracts in English
Sataka, Masao; Ishikawa, Norito; Chimi, Yasuhiro; Okubo, Nariaki; Sonoda, Takeshi*; Matsumura, Sho*; Yasuda, Kazuhiro*; Yasunaga, Kazufumi*; Shiiyama, Kenichi*; Abe, Hiroaki*; et al.
no journal, ,
no abstracts in English
Matsumura, Sho*; Yasuda, Kazuhiro*; Yasunaga, Kazufumi*; Shiiyama, Kenichi*; Sonoda, Takeshi*; Abe, Hiroaki*; Iwai, Takeo*; Sataka, Masao; Ishikawa, Norito; Chimi, Yasuhiro; et al.
no journal, ,
no abstracts in English
Katakabe, Yoichi*; Sugano, Ryuichiro*; Iwakiri, Hirotomo*; Hamaguchi, Dai; Iwai, Takeo*; Yoshida, Naoaki*
no journal, ,
no abstracts in English
Katakabe, Yoichi*; Sugano, Ryuichiro*; Iwakiri, Hirotomo*; Hamaguchi, Dai; Iwai, Takeo*; Yoshida, Naoaki*
no journal, ,
no abstracts in English
Wakai, Eiichi; Takada, Fumiki; Takaya, Shigeru; Kato, Shoichi; Kitazawa, Sin-iti; Okubo, Nariaki; Suzudo, Tomoaki; Fujii, Kimio; Yoshitake, Tsunemitsu; Kaji, Yoshiyuki; et al.
no journal, ,
no abstracts in English
Onitsuka, Takashi; Ando, Masami; Jitsukawa, Shiro; Iwai, Takeo*
no journal, ,
no abstracts in English
Wakai, Eiichi; Takada, Fumiki; Kato, Yoshiaki; Kato, Shoichi; Hirade, Tetsuya; Takaya, Shigeru; Matsui, Yoshinori; Fujii, Kimio; Aoto, Kazumi; Nogami, Shuhei*; et al.
no journal, ,
no abstracts in English
Kakuta, Shion*; Iwai, Takeo*; Tokanai, Fuyuki*; Sato, Tatsuhiko
no journal, ,
Influence on the range and dose distribution of carbon ion beam by MRI magnetic field was investigated using the PHITS code. The PHITS simulation results agree with the corresponding data obtained from an analytical method based on the Bethe-Bloch equation, indicating the accuracy of the simulation.
Goto, Tatsuki*; Iwai, Takeo*; Sato, Tatsuhiko
no journal, ,
We analyzed the motions of secondary particles generated by carbon ion therapy coupled with MRI, using the PHITS code.
Wakai, Eiichi; Takaya, Shigeru; Nagae, Yuji; Suzudo, Tomoaki; Hirade, Tetsuya; Matsui, Yoshinori; Nogami, Shuhei*; Hasegawa, Akira*; Abe, Hiroaki*; Iwai, Takeo*; et al.
no journal, ,
no abstracts in English
