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Journal Articles

Shedding light on the origin of $$^{204}$$Pb, the heaviest $$s$$-process; Only isotope in the solar system

Casanovas-Hoste, A.*; Harada, Hideo; Kimura, Atsushi; 130 of others*

Physical Review Letters, 133(5), p.052702_1 - 052702_8, 2024/07

 Times Cited Count:1 Percentile:53.15(Physics, Multidisciplinary)

Journal Articles

Measurement of the prompt fission $$gamma$$-rays from slow neutron-induced fission of $$^{235}$$U with STEFF

Wright, 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)

Journal Articles

Measurement of the $$^{140}$$Ce(n, $$gamma$$) cross section at n_TOF and its astrophysical implications for the chemical evolution of the universe

Amaducci, S.*; Harada, Hideo; Kimura, Atsushi; 130 of others*

Physical Review Letters, 132(12), p.122701_1 - 122701_8, 2024/03

 Times Cited Count:2 Percentile:72.87(Physics, Multidisciplinary)

Journal Articles

Measurement of the neutron-induced fission cross section of $$^{230}$$Th at the CERN n_TOF facility

Michalopoulou, 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:28.72(Physics, Nuclear)

Journal Articles

Neutron total and capture cross-section measurements of $$^{155}$$Gd and $$^{157}$$Gd in the thermal energy region with the Li-glass detectors and NaI(Tl) spectrometer installed in J-PARC$$cdot$$MLF$$cdot$$ANNRI

Kimura, 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:30.61(Nuclear Science & Technology)

Journal Articles

Measurement of the $$^{14}$$N(n, p)$$^{14}$$C cross section at the CERN n_TOF facility from subthermal energy to 800 keV

Torres-S$'a$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:28.72(Physics, Nuclear)

Journal Articles

Measurement of the $$^{77}$$Se(n,$$gamma$$) cross section up to 200 keV at the n_TOF facility at CERN

Sosnin, N. V.*; Harada, Hideo; Kimura, Atsushi; 128 of others*

Physical Review C, 107(6), p.065805_1 - 065805_9, 2023/06

 Times Cited Count:0 Percentile:0.00(Physics, Nuclear)

Journal Articles

Angular correlation of the two gamma rays produced in the thermal neutron capture on gadolinium-155 and gadolinium-157

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)

Journal Articles

$$^{74}$$Ge(n,$$gamma$$) cross section below 70 keV measured at n_TOF CERN

Lederer-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)

Journal Articles

Integral experiment of $$^{129}$$I(n, $$gamma$$) using fast neutron source in the "YAYOI" reactor

Nakamura, 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:10.40(Nuclear Science & Technology)

The present study performed integral experiments of $$^{129}$$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 $$^{129}$$I were obtained by measurement of decay gamma-rays emitted from $$^{130}$$I. The validity of the fast-neutron flux spectrum in the Glory hole was confirmed by the ${it C/E}$ ratios of the reaction rates of flux monitors. The experimental reaction rate of $$^{129}$$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 $$^{129}$$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 ${it et al.}$ below 100 keV.

Journal Articles

Integral experiments of technetium-99 using fast-neutron source reactor "YAYOI"

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 $$^{99}$$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 $$^{99}$$Tc were obtained by measuring decay gamma rays emitted from $$^{100}$$Tc. The neutron flux at an irradiation position was monitored with gold foils. The fast-neutron capture cross section of $$^{99}$$Tc at neutron energy of 85 keV was derived as 0.432$$pm$$0.023 barn by using the reaction rates of $$^{99}$$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.

Journal Articles

Measurement of the $$^{76}$$Ge(n,$$gamma$$) cross section at the n_TOF facility at CERN

Gawlik, 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:52.80(Physics, Nuclear)

Journal Articles

Destruction of the cosmic $$gamma$$-ray emitter $$^{26}$$Al in massive stars; Study of the key $$^{26}$$Al(n,$$alpha$$) reaction

Lederer-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:64.85(Physics, Nuclear)

Journal Articles

Destruction of the cosmic $$gamma$$-ray emitter $$^{26}$$Al in massive stars; Study of the key $$^{26}$$Al(n, p) reaction

Lederer-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:68.98(Physics, Nuclear)

Journal Articles

Bias effects on g- and s-factors in Westcott convention

Harada, Hideo

Applied Sciences (Internet), 11(14), p.6558_1 - 6558_20, 2021/07

 Times Cited Count:0 Percentile:0.00(Chemistry, Multidisciplinary)

For accuracy improvement of neutron activation analysis and neutron capture cross section, bias effects are investigated on g- and s-factors in the Westcott convention. As origins of biases, a joining function shape, neutron temperature and sample temperature, have been investigated. Biases are quantitatively deduced for two 1/v isotopes ($$^{197}$$Au, $$^{59}$$Co) and six non-1/v isotopes ($$^{241}$$Am, $$^{151}$$Eu, $$^{103}$$Rh, $$^{115}$$In, $$^{177}$$Hf, $$^{226}$$Ra). The s-factor calculated with a joining function deduced recently by a detailed Monte Carlo simulation is compared to s-factors calculated with traditional joining functions by Westcott. The results show the bias induced by sample temperature is small as the order of 0.1% for g-factor and the order of 1% for s-factor. On the other hand, biases induced by a joining function shape for s-factor depend significantly on both isotopes and neutron temperature. As the result, reaction rates are also affected significantly as well. The bias size on reaction rate is given in the case of epithermal neutron index r = 0.1, for the eight isotopes.

Journal Articles

Neutron capture cross sections of curium isotopes measured with ANNRI at J-PARC

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:41.66(Nuclear Science & Technology)

Journal Articles

Imaging neutron capture cross sections; i-TED proof-of-concept and future prospects based on Machine-Learning techniques

Babiano-Su$'a$rez, V.*; Harada, Hideo; Kimura, Atsushi; 132 of others*

European Physical Journal A, 57(6), p.197_1 - 197_17, 2021/06

 Times Cited Count:16 Percentile:85.85(Physics, Nuclear)

Journal Articles

Tackling discrepancy of data; Looking back at international cooperation on data evaluation

Harada, Hideo

Kaku Deta Nyusu (Internet), (129), p.35 - 43, 2021/06

This paper explained the activities of the International Nuclear Data Evaluation Co-operation (WPEC)'s subgroup SG-41, which was carried out to improve the accuracy of nuclear data. In this paper, by focusing on how to deal with discrepant data, the method of deriving recommended values from multiple measurement results was reviewed. It also explained how to derive the recommended values, including exercises.

Journal Articles

First results of the $$^{140}$$Ce(n,$$gamma$$)$$^{141}$$Ce cross-section measurement at n_TOF

Amaducci, S.*; Harada, Hideo; Kimura, Atsushi; 127 of others*

Universe (Internet), 7(6), p.200_1 - 200_11, 2021/06

 Times Cited Count:5 Percentile:33.94(Astronomy & Astrophysics)

Journal Articles

Measurement of the $$^{72}$$Ge(n,$$gamma$$) cross section over a wide neutron energy range at the CERN n_TOF facility

Dietz, 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:59.44(Physics, Nuclear)

509 (Records 1-20 displayed on this page)