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Nauchi, Yasushi*; Sato, Shunsuke*; Hayakawa, Takehito*; Kimura, Yasuhiko; Suyama, Kenya; Kashima, Takao*; Futakami, Kazuhiro*
Nuclear Instruments and Methods in Physics Research A, 1050, p.168109_1 - 168109_9, 2023/05
Times Cited Count:0 Percentile:0.02(Instruments & Instrumentation)Measurement of neutrons from spent nuclear fuel is performed in this study using the H method, which detects 2.223 MeV rays from neutron capture reaction of hydrogen using a highly pure germanium (HPGe) detector. The detection of the 2.223 MeV ray is affected by intense ray emission from fission products (FPs) because the emission rate of rays from the FP is seven orders of magnitude higher than the emission rate of neutrons. To shield the intense ray from the FP, the HPGe detector is placed off the axis of a collimator, whereas a polyethylene block is placed on the axis. In this geometry, the detector is shielded from the intense rays from the FP, but the detector can measure 2.223 MeV rays from the H reactions in the polyethylene block. The measured count rate of the 2.223 MeV rays is consistent with the expected rate within the statistical error, which is calculated based on the nuclide composition, which is primary Cm, estimated via depletion and decay calculations. Accordingly, the H method is considered feasible to quantify the number of neutron leakage from spent nuclear fuel assembly, which is applicable to certify burn up of the assembly.
Segawa, Mariko; Toh, Yosuke; Kai, Tetsuya; Kimura, Atsushi; Nakamura, Shoji
Annals of Nuclear Energy, 167, p.108828_1 - 108828_5, 2022/03
Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)Katabuchi, Tatsuya*; Toh, Yosuke; Mizumoto, Motoharu*; Saito, Tatsuhiro*; Terada, Kazushi*; Kimura, Atsushi; Nakamura, Shoji; Huang, M.*; Rovira Leveroni, G.; Igashira, Masayuki*
European Physical Journal A, 57(1), p.4_1 - 4_4, 2021/01
Times Cited Count:3 Percentile:46.8(Physics, Nuclear)Katabuchi, Tatsuya*; Iwamoto, Osamu; Hori, Junichi*; Kimura, Atsushi; Iwamoto, Nobuyuki; Nakamura, Shoji; Shibahara, Yuji*; Terada, Kazushi*; Rovira, G.*; Matsuura, Shota*
EPJ Web of Conferences, 239, p.01044_1 - 01044_4, 2020/09
Times Cited Count:2 Percentile:86.93(Nuclear Science & Technology)Katabuchi, Tatsuya*; Iwamoto, Osamu; Hori, Junichi*; Iwamoto, Nobuyuki; Kimura, Atsushi; Nakamura, Shoji; Shibahara, Yuji*; Terada, Kazushi*
JAEA-Conf 2019-001, p.193 - 197, 2019/11
Kitatani, Fumito
Kaku Deta Nyusu (Internet), (114), p.44 - 49, 2016/06
no abstracts in English
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Iwamoto, Osamu; Toh, Yosuke; Koizumi, Mitsuo; Kitatani, Fumito; Furutaka, Kazuyoshi; Igashira, Masayuki*; Katabuchi, Tatsuya*; et al.
European Physical Journal A, 51(12), p.180_1 - 180_8, 2015/12
Times Cited Count:3 Percentile:30.26(Physics, Nuclear)Mohr, P.*; Shizuma, Toshiyuki; Ueda, Hiroyasu*; Goko, Shinji*; Makinaga, Ayano*; Hara, Kaoru*; Hayakawa, Takehito; Lui, Y.-W.*; Ogaki, Hideaki*; Utsunomiya, Hiroaki*
Physical Review C, 69(3), p.032801_1 - 032801_4, 2004/03
Times Cited Count:35 Percentile:84.6(Physics, Nuclear)The neutron capture cross section of the unstable s-process branching nucleus W has been derived from experimental data of the inverse W(,n)W photodisintegration taken with monochromatic photon beams from laser Compton scattering. The result of mb at keV leads to a relatively high effective neutron density in the classical s process of . A realistic model for the s process in thermally pulsing AGB stars overestimates the abundance of Os significantly because of the relatively small neutron capture cross section of W.
Shinohara, Nobuo; Kono, Nobuaki; Suyama, Kenya; Inagawa, Jun; Nakahara, Yoshinori; Kurosawa, Setsumi; Watanabe, Kazuo; Usuda, Shigekazu; Oshima, Masumi; Katsuta, Hiroji; et al.
Radiochimica Acta, 89(3), p.135 - 138, 2001/05
Times Cited Count:2 Percentile:19.66(Chemistry, Inorganic & Nuclear)no abstracts in English
*
JNC TJ9400 99-001, 78 Pages, 1999/03
For studies on incineration of long-lived fission products (LLFPs) in a fast reactor, detailed characteristics of reactor core such as incineration performance have to be investigated. Therefore, accurate neutron cross section data of LLFPs become necessary. In the present study, in order to perform the precise measurements of keV-neutron capture cross sections of Tc-99, which is one of most important LLFPs, the details of the Tc-99 sample and the measurements with our experimental facilities were investigated.
Okajima, Shigeaki; Oigawa, Hiroyuki; Ando, Masaki; Mukaiyama, Takehiko
Proc., Int. Conf. on Nuclear Data for Science and Technology,Vol. 2, 0, p.1009 - 1011, 1994/00
no abstracts in English
Oigawa, Hiroyuki; Fujita, Yoshiaki*; *; Yamamoto, Shuji*; Kimura, Itsuro*
Journal of Nuclear Science and Technology, 28(10), p.879 - 893, 1991/10
no abstracts in English
Tasaka, Kanji
Nuclear Science and Engineering, 62(1), p.167 - 174, 1977/01
Times Cited Count:8no abstracts in English
Tasaka, Kanji
JAERI-M 5972, 34 Pages, 1975/02
no abstracts in English
Kimura, Atsushi
no journal, ,
no abstracts in English
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*; Kino, Koichi*
no journal, ,
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*; Kino, Koichi*
no journal, ,
Kimura, Atsushi; Nakamura, Shoji; Terada, Kazushi; Nakao, Taro; Harada, Hideo; Katabuchi, Tatsuya*; Igashira, Masayuki*; Takamiya, Koichi*; Fukutani, Satoshi*; Fujii, Toshiyuki*; et al.
no journal, ,
no abstracts in English
Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki; Iwamoto, Osamu; Katabuchi, Tatsuya*; Terada, Kazushi*; Rovira, G.*; Hori, Junichi*; Shibahara, Yuji*
no journal, ,
no abstracts in English
Kawase, Shoichiro; Kimura, Atsushi; Harada, Hideo; Iwamoto, Nobuyuki; Iwamoto, Osamu; Nakamura, Shoji; Segawa, Mariko; Toh, Yosuke
no journal, ,
no abstracts in English
Nakamura, Shoji; Shibahara, Yuji*; Endo, Shunsuke; Kimura, Atsushi
no journal, ,
Research and development were made for accuracy improvement of neutron capture cross-section data on Am among minor actinides. First, the emission probabilities of decay -rays were obtained with high accuracy, and the amount of the ground state of Am produced by reactor neutron irradiation of Am was examinded by-ray measurement. Next, the total amount of isomer and ground states was examoned by -ray measurement. This presentation will give the details of the measurenmets and the results of the neutron capture cross-sections of Am.