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Takaku, Yuhi; Kakefuda, Toyokazu*; Yashiro, Shigeo; Kimura, Hideo; Kuno, Tetsuya
JAEA-Testing 2024-006, 31 Pages, 2025/03
JAEA-Testing-2024-006.pdf:2.5MB
The Japan Atomic Energy Agency (JAEA) has a wide variety of servers across its departments, managed by on-site server administrators who are responsible for tasks including security measures. As a result, the workload and operational cost burdens are significant. Additionally, addressing the increasing frequency of security incidents in recent years, both domestically and internationally, is essential for JAEA's operations, which involve handling sensitive information. However, it is difficult for individual server administrators to take proactive measures to mitigate these risks. To address these challenges, we carried out the migration of systems that do not contain sensitive information to an external cloud environment with a focus on cost reduction. As a result, we clarified the conditions necessary for a smooth migration to an external cloud environment while achieving significant cost savings and established a foundation for implementing measures against security incidents.
Pb, the heaviest 
-process; Only isotope in the solar systemCasanovas-Hoste, A.*; Harada, Hideo; Kimura, Atsushi; 130 of others*
Physical Review Letters, 133(5), p.052702_1 - 052702_8, 2024/07
Times Cited Count：3 Percentile：75.95(Physics, Multidisciplinary)
-rays from slow neutron-induced fission of 
U with STEFFWright, T.*; Harada, Hideo; Kimura, Atsushi; 121 of others*
European Physical Journal A, 60(3), p.70_1 - 70_11, 2024/03
Times Cited Count：0 Percentile：0.00(Physics, Nuclear)
Ce(n, ) cross section at n_TOF and its astrophysical implications for the chemical evolution of the universeAmaducci, S.*; Harada, Hideo; Kimura, Atsushi; 130 of others*
Physical Review Letters, 132(12), p.122701_1 - 122701_8, 2024/03
Times Cited Count：5 Percentile：82.50(Physics, Multidisciplinary)
Th at the CERN n_TOF facilityMichalopoulou, V.*; Harada, Hideo; Kimura, Atsushi; 134 of others*
Physical Review C, 108(1), p.014616_1 - 014616_15, 2023/07
Times Cited Count：2 Percentile：43.87(Physics, Nuclear)
Gd and 
Gd in the thermal energy region with the Li-glass detectors and NaI(Tl) spectrometer installed in J-PARC
MLFANNRIKimura, Atsushi; Nakamura, Shoji; Endo, Shunsuke; Rovira Leveroni, G.; Iwamoto, Osamu; Iwamoto, Nobuyuki; Harada, Hideo; Katabuchi, Tatsuya*; Terada, Kazushi*; Hori, Junichi*; et al.
Journal of Nuclear Science and Technology, 60(6), p.678 - 696, 2023/06
Times Cited Count：2 Percentile：28.39(Nuclear Science & Technology)
N(n, p)C cross section at the CERN n_TOF facility from subthermal energy to 800 keVTorres-S
nchez, P.*; Harada, Hideo; Kimura, Atsushi; 129 of others*
Physical Review C, 107(6), p.064617_1 - 064617_15, 2023/06
Times Cited Count：1 Percentile：25.07(Physics, Nuclear)
Se(n,) cross section up to 200 keV at the n_TOF facility at CERNSosnin, N. V.*; Harada, Hideo; Kimura, Atsushi; 128 of others*
Physical Review C, 107(6), p.065805_1 - 065805_9, 2023/06
Times Cited Count：1 Percentile：25.07(Physics, Nuclear)Goux, P.*; Glessgen, F.*; Gazzola, E.*; Singh Reen, M.*; Focillon, W.*; Gonin, M.*; Tanaka, Tomoyuki*; Hagiwara, Kaito*; Ali, A.*; Sudo, Takashi*; et al.
Progress of Theoretical and Experimental Physics (Internet), 2023(6), p.063H01_1 - 063H01_15, 2023/06
Times Cited Count：0 Percentile：0.00(Physics, Multidisciplinary)
Ge(n,) cross section below 70 keV measured at n_TOF CERNLederer-Woods, C.*; Harada, Hideo; Kimura, Atsushi; 128 of others*
European Physical Journal A, 58(12), p.239_1 - 239_9, 2022/12
Times Cited Count：0 Percentile：0.00(Physics, Nuclear)
I(n, ) using fast neutron source in the "YAYOI" reactorNakamura, Shoji; Toh, Yosuke; Kimura, Atsushi; Hatsukawa, Yuichi*; Harada, Hideo
Journal of Nuclear Science and Technology, 59(7), p.851 - 865, 2022/07
Times Cited Count：1 Percentile：9.64(Nuclear Science & Technology)The present study performed integral experiments of I using a fast-neutron source reactor "YAYOI" of the University of Tokyo to validate evaluated nuclear data libraries. The iodine-129 sample and flux monitors were irradiated by fast neutrons in the Glory hole of the YAYOI reactor. Reaction rates of I were obtained by measurement of decay gamma-rays emitted from 
I. The validity of the fast-neutron flux spectrum in the Glory hole was confirmed by the 
ratios of the reaction rates of flux monitors. The experimental reaction rate of I was compared with that calculated with both the fast-neutron flux spectrum and evaluated nuclear data libraries. The present study revealed that the evaluated nuclear data of I cited in JENDL-4.0 should be reduced as much as 18% in neutron energies ranging from 10 keV to 3 MeV, and supported the reported data by Noguere 
below 100 keV.
Nakamura, Shoji; Hatsukawa, Yuichi*; Kimura, Atsushi; Toh, Yosuke; Harada, Hideo
Journal of Nuclear Science and Technology, 58(12), p.1318 - 1329, 2021/12
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)The present study performed fast-neutron capture cross-section measurement of 
Tc by an activation method using a fast-neutron source reactor "YAYOI" of the University of Tokyo. Technetium-99 samples were irradiated with reactor neutrons using a pneumatic system. Reaction rates of Tc were obtained by measuring decay gamma rays emitted from 
Tc. The neutron flux at an irradiation position was monitored with gold foils. The fast-neutron capture cross section of Tc at neutron energy of 85 keV was derived as 0.432
0.023 barn by using the reaction rates of Tc, evaluated cross-section data and the fast-neutron flux spectrum of the YAYOI reactor. The present study agreed with the evaluated nuclear data library JENDL-4.0.
Ge(n,) cross section at the n_TOF facility at CERNGawlik, A.*; Harada, Hideo; Kimura, Atsushi; 130 of others*
Physical Review C, 104(4), p.044610_1 - 044610_7, 2021/10
Times Cited Count：5 Percentile：51.13(Physics, Nuclear)-ray emitter 
Al in massive stars; Study of the key Al(n,
) reactionLederer-Woods, C.*; Harada, Hideo; Kimura, Atsushi; 123 of others*
Physical Review C, 104(3), p.L032803_1 - L032803_6, 2021/09
Times Cited Count：8 Percentile：67.39(Physics, Nuclear)-ray emitter Al in massive stars; Study of the key Al(n, p) reactionLederer-Woods, C.*; Harada, Hideo; Kimura, Atsushi; 121 of others*
Physical Review C, 104(2), p.L022803_1 - L022803_7, 2021/08
Times Cited Count：8 Percentile：67.39(Physics, Nuclear)Kawase, Shoichiro*; Kimura, Atsushi; Harada, Hideo; Iwamoto, Nobuyuki; Iwamoto, Osamu; Nakamura, Shoji; Segawa, Mariko; Toh, Yosuke
Journal of Nuclear Science and Technology, 58(7), p.764 - 786, 2021/07
Times Cited Count：4 Percentile：39.96(Nuclear Science & Technology)Babiano-Surez, V.*; Harada, Hideo; Kimura, Atsushi; 132 of others*
European Physical Journal A, 57(6), p.197_1 - 197_17, 2021/06
Times Cited Count：19 Percentile：88.41(Physics, Nuclear)Ce(n,)
Ce cross-section measurement at n_TOFAmaducci, S.*; Harada, Hideo; Kimura, Atsushi; 127 of others*
Universe (Internet), 7(6), p.200_1 - 200_11, 2021/06
Times Cited Count：5 Percentile：32.63(Astronomy & Astrophysics)
Ge(n,) cross section over a wide neutron energy range at the CERN n_TOF facilityDietz, M.*; Harada, Hideo; Kimura, Atsushi; 121 of others*
Physical Review C, 103(4), p.045809_1 - 045809_8, 2021/04
Times Cited Count：7 Percentile：63.10(Physics, Nuclear)
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：43.33(Physics, Nuclear)