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SGo, Shintaro*; Ideguchi, Eiji*; Yokoyama, Rin*; Aoi, Nori*; Azaiez, F.*; Furutaka, Kazuyoshi; Hatsukawa, Yuichi; Kimura, Atsushi; Kisamori, Keiichi*; Kobayashi, Motoki*; et al.
Physical Review C, 103(3), p.034327_1 - 034327_8, 2021/03
Times Cited Count：4 Percentile：61.99(Physics, Nuclear)Iwamoto, Yosuke; Meigo, Shinichiro; Hashimoto, Shintaro
Journal of Nuclear Materials, 538, p.152261_1 - 152261_9, 2020/09
Times Cited Count：10 Percentile：86.5(Materials Science, Multidisciplinary)The displacements-per-atom (dpa) is widely used as an exposure unit to predict the operating lifetime of materials in radiation environments. Because the athermal-recombination-corrected dpa (arc-dpa) model is a more realistic model than the standard Norgertt-Robinson-Torrens (NRT) model, new evaluation of radiation damage will be performed using the arc-dpa model as a standard. In this work, the recent arc-dpa model of various materials are incorporated in PHITS, and the rescaling factors (NRT-dpa/arc-dpa) over a wide energy range are reported. For neutron incidences with the energy spectrum determined in selected nuclear facilities and proton incidences with energies of 600 MeV-50 GeV, the rescaling factor for each material is independent of these irradiation conditions with almost the same value for each material. Our findings will be beneficial for rescaling the NRT-dpa model used for radiation damage applications over a wide energy region.
Sc and development of the 
subshell closureSteppenbeck, D.*; Takeuchi, Satoshi*; Aoi, Nori*; Doornenbal, P.*; Matsushita, Masafumi*; Wang, H.*; Baba, Hidetada*; Go, Shintaro*; Holt, J. D.*; Lee, J.*; et al.
Physical Review C, 96(6), p.064310_1 - 064310_10, 2017/12
Times Cited Count：15 Percentile：78.96(Physics, Nuclear)no abstracts in English
SGo, Shintaro*; Ideguchi, Eiji*; Yokoyama, Rin*; Kobayashi, Motoki*; Kisamori, Keiichi*; Takaki, Motonobu*; Miya, Hiroyuki*; Ota, Shinsuke*; Michimasa, Shinichiro*; Shimoura, Susumu*; et al.
JPS Conference Proceedings (Internet), 6, p.030005_1 - 030005_4, 2015/06
Ar and the 
=32 subshell closureSteppenbeck, D.*; Takeuchi, Satoshi*; Aoi, Nori*; Doornenbal, P.*; Matsushita, Masafumi*; Wang, H.*; Utsuno, Yutaka; Baba, Hidetada*; Go, Shintaro*; Lee, J.*; et al.
Physical Review Letters, 114(25), p.252501_1 - 252501_6, 2015/06
Times Cited Count：43 Percentile：88.5(Physics, Multidisciplinary)The neutron-rich nucleus Ar is produced by the fragmentation reactions of 
Ca, Sc, and 
Ti at the RIBF facility in RIKEN, and its deexcited 
rays are observed for the first time. The first 
level in Ar is identified to lie at 1178(18)keV from the most intense -ray spectra. This experimental data, together with the systematics of the levels for surrounding nuclei, is analyzed with large-scale shell-model calculations. Consequently, the 
sub-shell gap in Ar is equivalent to that of 
Ca, thus making the level in Ar higher than that of 
Ar. The shell-model calculation also predicts that the sub-shell gap enhances in going from Ca to Ar, which will be verified by forthcoming experiments for Ar.
CaSteppenbeck, D.*; Takeuchi, Satoshi*; Aoi, Nori*; Doornenbal, P.*; Matsushita, Masafumi*; Wang, H.*; Baba, Hidetada*; Fukuda, Naoki*; Go, Shintaro*; Homma, Michio*; et al.
Nature, 502(7470), p.207 - 210, 2013/10
Times Cited Count：269 Percentile：99.79(Multidisciplinary Sciences)no abstracts in English
*; Saito, Kyoichi*; *; Furusaki, Shintaro*; Sugo, Takanobu; *
Industrial & Engineering Chemistry Research, 33(3), p.662 - 666, 1994/00
Times Cited Count：62 Percentile：93.67(Engineering, Chemical)no abstracts in English
*; Saito, Kyoichi*; Furusaki, Shintaro*; Sugo, Takanobu; Okamoto, Jiro
Nihon Kagakkai-Shi, 1988(2), p.212 - 216, 1988/00
no abstracts in English
Hori, Takahiro*; Saito, Kyoichi*; Furusaki, Shintaro*; Sugo, Takanobu; Okamoto, Jiro
Kagaku Kogaku Rombunshu, 13(6), p.795 - 800, 1987/12
Times Cited Count：7 Percentile：58.08(Engineering, Chemical)Chelating resins containing amide
Saito, Kyoichi*; Hori, Takahiro*; Furusaki, Shintaro*; Sugo, Takanobu; Okamoto, Jiro
Industrial & Engineering Chemistry Research, 26(10), p.1977 - 1981, 1987/10
Times Cited Count：62 Percentile：93.89(Engineering, Chemical)A porous, amidoxime-group-containing membrane was prepared by radiation-induced grafit polymerization of acrylonitrile onto porous polyethylene film followed by chemical conversion of the produced cyano group to an amidoxime group.
Saito, Kyoichi*; Yamada, Shinji*; Furusaki, Shintaro*; Sugo, Takanobu; Okamoto, Jiro
J. Membr. Sci., 34(2), p.307 - 315, 1987/00
Times Cited Count：36 Percentile：87.65(Engineering, Chemical)Chelating membranes containing amidoxime groups for the recovery of uranium were synthesized by teh radiation-induced graft polymerization of acrylonitrile onto high- and low-density polyethylene films, followed by amidoximation of the cyano groups.
Furusaki, Shintaro*; Okamoto, Jiro; Sugo, Takanobu; Saito, Kyoichi*
Kemikaru Enjiniyaringu, 32(7), p.521 - 524, 1987/00
no abstracts in English
Iwamoto, Yosuke; Hashimoto, Shintaro; Yoshida, Makoto*; Iwamoto, Hiroki; Meigo, Shinichiro; Yonehara, Katsuya*; Spina, T.*; Hurh, P.*
no journal, ,
For defect production, it is the number of recoils weighted by the damage energy produced in each recoil that is most important. This quantity is determined by "weighed" the recoil spectra by the damage energy produced in each recoil. However, the damage energy spectra have not been investigated yet for the proton energy range from several MeV to hundred GeV, where recoil is regarded as nuclear reaction product. In this work, we calculated damage energy spectra of all nuclear reaction products under high energy proton irradiation on tungsten with the energy range from 10 MeV to 120 GeV using the PHITS code. The average damage energy of tungsten was 30-80 keV including nuclear elastic and non-elastic components and that of lutetium was 550-900 keV including non-elastic component. In this presentation, we will also introduce our experimental plan for measurement of dpa cross sections with 120 GeV protons at Fermi National Accelerator Laboratory (FNAL).
Iwamoto, Yosuke; Meigo, Shinichiro; Hashimoto, Shintaro
no journal, ,
The displacement per atom (dpa) value defined by the conventional model (NRT) has been used as an index of radiation damage in materials. On the other hands, athermal recombination correction between interstitial atom and vacancy obtained by Molecular dynamics was reported by Nordlund et al. in 2018. In this study, we calculated the arc-dpa and NRT-dpa for nuclear reactor, fusion reactor and accelerator facilities using PHITS. As a result, the scaling factor (NRT-dpa/arc-dpa) of Al, Fe, Cu and W are almost same for neutrons and 1 and 50 GeV protons irradiation. These values ranges from 1.5 to 6.0 and the NRT-dpa is larger than arc-dpa for all cases.
Sugiyama, Koichi*; Go, Shintaro*; Tomimatsu, Taro*; Kai, Tamito*; Nagae, Daisuke*; Ishibashi, Yuichi*; Matsunaga, Sotaro*; Nagata, Yuto*; Nishibata, Hiroki*; Washiyama, Kohei*; et al.
no journal, ,
We have successfully performed in-beam gamma-ray spectroscopy using the isomer-scope technique to study excited-state structure of neutron-rich heavy-actinide nuclei. The neutron-rich heavy-actinide nuclei were produced in the multinucleon-transfer reactions with a 
Cm target and 
O projectiles accelerated with the JAEA tandem accelerator. Projectile-like scattered particles were detected with Si E-
E telescopes placed at the backward angle, and target-like scattered particles of isomers were caught by an annular aluminum plate placed at about 60-mm downstream from the target. Four Ge detectors and 4 LaBr detectors were placed at the periphery of the aluminum plate, and detected gamma rays from the isomers. Gamma rays emitted from the actinide isomers were successfully observed with a good sensitivity owing to the tungsten shield placed between the target and the detectors.
