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Journal Articles

Neutron-production double-differential cross sections of $$^{rm nat}$$Pb and $$^{209}$$Bi in proton-induced reactions near 100 MeV

Iwamoto, Hiroki; Meigo, Shinichiro; Satoh, Daiki; Iwamoto, Yosuke; Ishi, Yoshihiro*; Uesugi, Tomonori*; Yashima, Hiroshi*; Nishio, Katsuhisa; Sugihara, Kenta*; $c{C}$elik, Y.*; et al.

Nuclear Instruments and Methods in Physics Research B, 544, p.165107_1 - 165107_15, 2023/11

 Times Cited Count:4 Percentile:62.70(Instruments & Instrumentation)

The lack of double-differential cross-section (DDX) data for neutron production below the incident proton energy of 200 MeV hinders the validation of spallation models in technical applications, such as research and development of accelerator-driven systems (ADSs). The present study aims to obtain experimental DDX data for ADS spallation target materials in this energy region and identify issues related to the spallation models by comparing them with the analytical predictions. The DDXs for the ($$p, xn$$) reactions of $$^{rm nat}$$Pb and $$^{209}$$Bi in the 100-MeV region were measured over an angular range of 30$$^{circ}$$ to 150$$^{circ}$$ using the time-of-flight method. The measurements were conducted at Kyoto University utilizing the FFAG accelerator. The DDXs obtained were compared with calculation results from Monte Carlo-based spallation models and the evaluated nuclear data library, JENDL-5. Comparison between the measured DDX and analytical values based on the spallation models and evaluated nuclear data library indicated that, in general, the CEM03.03 model demonstrated the closest match to the experimental values. Additionally, the comparison highlighted several issues that need to be addressed in order to improve the reproducibility of the proton-induced neutron-production DDX in the 100 MeV region by these spallation models and evaluated nuclear data library.

Journal Articles

Nature of structural instabilities in superconducting Sr$$_3$$Ir$$_4$$Sn$$_{13}$$

Kaneko, Koji; Cheung, Y. W.*; Hu, Y.*; Imai, Masaki*; Tanioku, Yasuaki*; Kanagawa, Hibiki*; Murakawa, Joichi*; Moriyama, Kodai*; Zhang, W.*; Lai, K. T.*; et al.

JPS Conference Proceedings (Internet), 30, p.011032_1 - 011032_6, 2020/03

Journal Articles

Signature splitting inversion and backbending in $$^{80}$$Rb

He, C.*; Shen, S.*; Wen, S.*; Zhu, L.*; Wu, X.*; Li, G.*; Zhao, Y.*; Yan, Y.*; Bai, Z.*; Wu, Y.*; et al.

Physical Review C, 87(3), p.034320_1 - 034320_10, 2013/03

 Times Cited Count:6 Percentile:41.32(Physics, Nuclear)

Journal Articles

High-j proton alignments in $$^{101}$$Pd

Zhou, H. B.*; Zhou, X. H.*; Zhang, Y. H.*; Zheng, Y.*; Liu, M. L.*; Zhang, N. T.*; Chen, L.*; Wang, S. T.*; Li, G. S.*; Wang, H. X.*; et al.

European Physical Journal A, 47(9), p.107_1 - 107_7, 2011/09

 Times Cited Count:6 Percentile:40.41(Physics, Nuclear)

High-spin states in $$^{101}$$Pd have been investigated by means of in-beam $$gamma$$-ray spectroscopic techniques. The previously known $$d$$$$_{5/2}$$ and 1/2$$^-$$[550] bands were extended to higher spins. The band crossings observed experimentally are explained by the alignment of $$g$$$$_{9/2}$$ protons. The band properties in $$^{101}$$Pd are compared with those in the neighboring nuclei and are discussed within the framework of the cranked shell model.

Journal Articles

Identification of a new band and its signature inversion in $$^{174}$$Re

Zhang, Y. H.*; Guo, S.*; Zhou, X. H.*; Ma, L.*; Guo, W. T.*; Oshima, Masumi; Toh, Yosuke; Koizumi, Mitsuo; Osa, Akihiko; Kimura, Atsushi; et al.

Chinese Physics Letters, 24(5), p.1203 - 1206, 2007/05

High-spin states in $$^{174}$$Re are investigated via in-beam $$gamma$$-ray spectroscopic method and $$gamma - gamma$$ coincidence relationships are analysed. A new band is identified due to its spectroscopic connection with the known $$pi 1/2^-[541] bigotimes nu 1/2^-[521]$$ band. This band is proposed to be the ground-state band built on the $$pi 1/2^-[541] bigotimes nu 5/2^-[512]$$ configuration in view of the low-lying intrinsic states in neighbouring odd-mass nuclei. It is in particular interesting that the new band exhibits a phenomenon of low-spin signature inversion, providing a new situation for theoretical investigations.

Journal Articles

Band properties of the transitional nucleus $$^{187}$$Pt

Zhou, X. H.*; Xing, Y. B.*; Liu, M. L.*; Zhang, Y. H.*; Guo, Y. X.*; Ma, L.*; Lei, X. G.*; Guo, W. T.*; Oshima, Masumi; Toh, Yosuke; et al.

Physical Review C, 75(3), p.034314_1 - 034314_17, 2007/03

 Times Cited Count:18 Percentile:72.88(Physics, Nuclear)

High-spin states in $$^{187}$$Pt has been studied experimentally by in-beam $$gamma$$-ray spectroscopy. The previously known bands based on the $$nu i_{13/2}, nu 7/2^{-}[503] $$ and $$nu i^{2}_{13/2} nu j$$ configurations have been extended to high-spin states, and new rotational bands associated with the $$nu 3/2^{-}[512]$$ and $$nu 1/2^{-}[521]$$ Nilsson orbits have been identified. The total Routhian surface calculations indicate that the transitional nucleus $$^{187}$$Pt is very soft with respect to $$beta$$ and $$gamma$$ deformations. The band properties have been compared with the systematics observed in neiboring nuclei and have been interpreted within the framework of the cranked shell model.

Journal Articles

Observation of a $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ oblate band in $$^{188}$$Tl

Zhou, X. H.*; Ma, L.*; Xing, Y. B.*; Zhang, Y. H.*; Guo, Y. X.*; Lei, X. G.*; Xie, C. Y.*; Oshima, Masumi; Toh, Yosuke; Koizumi, Mitsuo; et al.

European Physical Journal A, 28(3), p.271 - 275, 2006/06

 Times Cited Count:2 Percentile:20.69(Physics, Nuclear)

Excited states in $$^{188}$$Tl have been studied experimentally by in-beam $$gamma$$-ray spectroscopy. A rotational band built on the $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ configuration with oblate deformation has been established for $$^{188}$$Tl. Based on the structure systematics of the oblate $$pi rm h_{9/2} bigotimes nu rm i_{13/2}$$ bands in heavier odd-odd Tl nuclei, we have tentatively proposed spin values for the new band in $$^{188}$$Tl. The new oblate band shows low-spin signature inversion, and it can be interpreted qualitatively by the two-quasiparticle plus rotor model including a $$J$$-dependent $$p$$-$$n$$ residual interaction.

Journal Articles

Experimental method for assessment of team situation awareness

Shu, Y.; Goh, T.*; Furuta, Kazuo*

Proceedings of Cognitive System Engineering in Process Control (CSEPC 2004), p.140 - 147, 2004/11

Team Situation Awareness (TSA) is one of the intermediate steps in the team decision-making process, widely used to assess performance of human-artifact interaction in many operational domains, such as power plant, aviation, emergency center and so on. However, there is still no clearly understandable, generally accepted, objective ways to measure TSA. Following our previous work on TSA that TSA is modeled as an entity reducible to individual SAs and mutual beliefs, in this study, the authors developed a combination of measures to capture TSA and study various interventions that contribute to formation of TSA. TSA was measured both as a state and a process entity using queries and protocol analysis. Results showed that proposed method is practically useful for TSA measurement.

Journal Articles

Multi-quasiparticle excitations in $$^{145}$$Tb

Zheng, Y.*; Zhou, X. H.*; Zhang, Y. H.*; Hayakawa, Takehito; Oshima, Masumi; Toh, Yosuke; Shizuma, Toshiyuki; Katakura, Junichi; Hatsukawa, Yuichi; Matsuda, Makoto; et al.

Journal of Physics G; Nuclear and Particle Physics, 30(4), p.465 - 479, 2004/04

 Times Cited Count:8 Percentile:47.32(Physics, Nuclear)

no abstracts in English

Journal Articles

High spin states in $$^{158}$$Dy

Hayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Shizuma, Toshiyuki; Katakura, Junichi; Iimura, Hideki; Mitarai, Shiro*; Zhang, Y.*; et al.

Physical Review C, 68(6), p.067303_1 - 067303_4, 2003/12

 Times Cited Count:2 Percentile:20.87(Physics, Nuclear)

no abstracts in English

Journal Articles

Inelastic excitation of $$^{187}$$Re

Shizuma, Toshiyuki; Toh, Yosuke; Oshima, Masumi; Sugawara, Masahiko*; Matsuda, Makoto; Hayakawa, Takehito; Koizumi, Mitsuo; Osa, Akihiko; Zhang, Y. H.*; Liu, Z.*

European Physical Journal A, 17(2), p.159 - 165, 2003/06

 Times Cited Count:10 Percentile:54.74(Physics, Nuclear)

High-spin states in $$^{187}$$Re populated by inelastic scattering of a 500-MeV $$^{82}$$Se beam have been studied by means of in-beam $$gamma$$-ray spectroscopy. Levels built on the $$5/2^+$$[402] and $$9/2^-$$[514] one-quasiparticle states were measured up to $$I^pi=(21/2^+)$$ and $$(21/2^-)$$, respectively. In additions, several new levels including an isomer at 1682 keV with a half-life of 114(23) ns have been found. Quasiparticle configurations of the levels and the transition rates are discussed.

Journal Articles

Electric-dipole transition probabilities between yrast bands in $$^{157}$$Gd

Hayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Shinohara, Nobuo; Iimura, Hideki; Shizuma, Toshiyuki; Zhang, Y.*; Sugawara, Masahiko*; et al.

Physics Letters B, 551(1-2), p.79 - 85, 2003/01

 Times Cited Count:11 Percentile:57.33(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Rotaional alignment of the h$$_{11/2}$$ band in $$^{157}$$Dy

Hayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Katakura, Junichi; Iimura, Hideki; Shizuma, Toshiyuki; Mitarai, Shiro*; Sugawara, Masahiko*; et al.

European Physical Journal A, 15(3), p.299 - 302, 2002/11

 Times Cited Count:9 Percentile:47.28(Physics, Nuclear)

no abstracts in English

Journal Articles

A Position-sensitive particle detector for Coulomb excitation experiment

Toh, Yosuke; Oshima, Masumi; Hayakawa, Takehito; Hatsukawa, Yuichi; Katakura, Junichi; Matsuda, Makoto; Iimura, Hideki; Kusakari, Hideshige*; Nishimiya, Daisuke*; Sugawara, Masahiko*; et al.

Review of Scientific Instruments, 73(1), p.47 - 50, 2002/01

 Times Cited Count:9 Percentile:47.02(Instruments & Instrumentation)

no abstracts in English

Journal Articles

A Filter bank system for scatteted spectrum analysis in collective Thomson scattering diagnostic on JT-60U

Lee, S.; Kondoh, Takashi; Yonemoto, Y.*; Miura, Yukitoshi

Review of Scientific Instruments, 71(12), p.4445 - 4448, 2000/12

 Times Cited Count:6 Percentile:43.61(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Observation of signature inversion in odd-odd $$^{178}$$Ir

Zhang, Y. H.*; Hayakawa, Takehito; Oshima, Masumi; Toh, Yosuke; Katakura, Junichi; Hatsukawa, Yuichi; Matsuda, Makoto; Shinohara, Nobuo; Ishii, Tetsuro; Kusakari, Hideshige*; et al.

European Physical Journal A, 8(4), p.439 - 442, 2000/09

 Times Cited Count:14 Percentile:59.95(Physics, Nuclear)

no abstracts in English

Journal Articles

Neutral particle analysis in Mev energy range and relative role of He$$^{+}$$ and C$$^{5+}$$ ions in fast proton neutralization in ICRF and combined ICRF/NBI-heated JT-60U plasmas

Afanassiev, V. I.*; Kusama, Yoshinori; Nemoto, Masahiro; Kondoh, Takashi; Petrov, S. Y.*; Kozlovskij, S. S.*; Sato, Minoru; Morioka, Atsuhiko; Tsukahara, Yoshimitsu; Nishitani, Takeo; et al.

Plasma Physics and Controlled Fusion, 39(10), p.1509 - 1524, 1997/10

 Times Cited Count:21 Percentile:57.83(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Recent results on radio frequency experiments in JT-60U

Kimura, Haruyuki; Naito, Osamu; Saigusa, Mikio; Ide, Shunsuke; Nemoto, Masahiro; Ikeda, Yoshitaka; Moriyama, Shinichi; Kondoh, Takashi; Fujii, Tsuneyuki; Seki, Masami; et al.

AIP Conference Proceedings 355, p.81 - 88, 1996/00

no abstracts in English

JAEA Reports

Direct measurement of MeV-range atomic hydrogen using a charge-exchange neutral particle analyzer in ICRF-heated JT-60U plasmas

Kusama, Yoshinori; Afanassiev, V. I.*; S.Y.Petrov*; Nemoto, Masahiro; Kimura, Haruyuki; Morioka, Atsuhiko; Sato, Minoru; Tsukahara, Yoshimitsu; Saigusa, Mikio; Kondoh, Takashi; et al.

JAERI-Research 94-036, 9 Pages, 1994/10

JAERI-Research-94-036.pdf:0.51MB

no abstracts in English

Oral presentation

Long-pulse production of positive ion beams from JT-60U for JT-60 Super Advanced

Hanada, Masaya; Kojima, Atsushi; Akino, Noboru; Komata, Masao; Mogaki, Kazuhiko; Oh, B. H.*; Jeong, S. H.*; Chang, D. H.*; Lee, K. W.*; Bae, Y. S.*

no journal, , 

no abstracts in English

Oral presentation

Study of high-spin states in A$$sim$$30 region via $$^{16}$$O+$$^{24}$$Mg reaction

Ideguchi, Eiji*; Liu, M.*; Morikawa, Tsuneyasu*; Toh, Yosuke; Koizumi, Mitsuo; Oshima, Masumi; Kimura, Atsushi; Furutaka, Kazuyoshi; Hatsukawa, Yuichi; Cederwall, B.*; et al.

no journal, , 

no abstracts in English

21 (Records 1-20 displayed on this page)