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Shimomura, Koichiro*; Koda, Akihiro*; Pant, A. D.*; Sunagawa, Hikaru*; Fujimori, Hiroshi*; Umegaki, Izumi*; Nakamura, Jumpei*; Fujihara, Masayoshi; Tampo, Motonobu*; Kawamura, Naritoshi*; et al.
Interactions (Internet), 245(1), p.31_1 - 31_6, 2024/12
Shimomura, Koichiro*; Koda, Akihiro*; Pant, A. D.*; Natori, Hiroaki*; Fujimori, Hiroshi*; Umegaki, Izumi*; Nakamura, Jumpei*; Tampo, Motonobu*; Kawamura, Naritoshi*; Teshima, Natsuki*; et al.
Journal of Physics; Conference Series, 2462, p.012033_1 - 012033_5, 2023/03
Times Cited Count：0 Percentile：0.21(Physics, Applied)Okutsu, Kenichi*; Yamashita, Takuma*; Kino, Yasushi*; Nakashima, Ryota*; Miyashita, Konan*; Yasuda, Kazuhiro*; Okada, Shinji*; Sato, Motoyasu*; Oka, Toshitaka; Kawamura, Naritoshi*; et al.
Fusion Engineering and Design, 170, p.112712_1 - 112712_4, 2021/09
Times Cited Count：3 Percentile：44.61(Nuclear Science & Technology)A muonic molecule which consists of two hydrogen isotope nuclei (deuteron (d) or tritium (t)) and a muon decays immediately via nuclear fusion and the muon will be released as a recycling muon, and start to find another hydrogen isotope nucleus. The reaction cycle continues until the muon ends up its lifetime of 2.2 
s. Since the muon does not participate in the nuclear reaction, the reaction is so called a muon catalyzed fusion (CF). The recycling muon has a particular kinetic energy (KE) of the muon molecular orbital when the nuclear reaction occurs. Since the KE is based on the unified atom limit where distance between two nuclei is zero. A precise few-body calculation estimating KE distribution (KED) is also in progress, which could be compared with the experimental results. In the present work, we observed recycling muons after CF reaction.
Yamashita, Takuma*; Okutsu, Kenichi*; Kino, Yasushi*; Nakashima, Ryota*; Miyashita, Konan*; Yasuda, Kazuhiro*; Okada, Shinji*; Sato, Motoyasu*; Oka, Toshitaka; Kawamura, Naritoshi*; et al.
Fusion Engineering and Design, 169, p.112580_1 - 112580_5, 2021/08
Times Cited Count：3 Percentile：44.61(Nuclear Science & Technology)A muon () having 207 times larger mass of electron and the same charge as the electron has been known to catalyze a nuclear fusion between deuteron (d) and triton (t). These two nuclei are bound by and form a muonic hydrogen molecular ion, dt. Due to the short inter-nuclear distance of dt, the nuclear fusion, d +t
+ n + 17.6 MeV, occurs inside the molecule. This reaction is called muon catalyzed fusion (CF). Recently, the interest on CF is renewed from the viewpoint of applications, such as a source of high-resolution muon beam and mono-energetic neutron beam. In this work, we report a time evolution calculation of CF in a two-layered hydrogen isotope target.
*; *
PNC TJ9606 98-001, 37 Pages, 1997/03
Accuracy of the Helium Accumulation Fluence Monitor (HAFM) developed by Power Reactor and Nuclear Fuel Development Corporation (PNC) was experimentally estimated by using neutron irradiated HAFM samples. Samples were irradiated by neutrons in the standard neutron spectrum fields of the Fast Neutron Source Reactor of "YAYOI" at university of Tokyo. The amount of Helium produced in the samples was measured by the Helium Atoms Measurement System (HAMS) at Kyushu University and by the HAFM measurement system at PNC. Both experimental results and the values estimated by the multi-foil activation method were compared. The neutron irradiated samples measured by the HAMS were two 1 mg enriched boron HAFM samples (boron chips were enveloped in a vanadium capsule), two 10mg natural boron HAFM samples, two 40 mg enriched boron HAFM samples, two natural boron chips and two TLD chips. Several dummy samples, which were not irradiated by neutrons, were also measured to estimate the amount of background helium at sample measurements. The overall errors for the helium measurements of samples by the HAMS were estimated to be less than 
3%. The amount of background helium determined by the dummy sample measurements was less than 1% of helium contained in the neutron-irradiated samples. Our results by the HAMS were mostly in good agreement with the results by PNC. The estimated values supported our results. Reliance of helium measurement by the HAMS and by the HAFM measurement system, and validity of the neutron dosimetry by the helium accumulation method were consequently confirmed.
Shibata, Keiichi; Chiba, Satoshi; Fukahori, Tokio; Hasegawa, Akira; Iwamoto, Osamu; *; *; Kawano, Toshihiko*; Matsunobu, Hiroyuki*; Murata, Toru*; et al.
Proc. of Int. Conf. on Nucl. Data for Science and Technol., p.904 - 906, 1997/00
no abstracts in English
Nakagawa, Tsuneo; Shibata, Keiichi; Chiba, Satoshi; Fukahori, Tokio; Nakajima, Yutaka; ; Kawano, Toshihiko*; Kanda, Yukinori*; Osawa, Takaaki*; Matsunobu, Hiroyuki*; et al.
Journal of Nuclear Science and Technology, 32(12), p.1259 - 1271, 1995/12
Times Cited Count：498 Percentile：99.95(Nuclear Science & Technology)no abstracts in English
U inelastic scattering cross section evaluationKanda, Yukinori*; Fujikawa, Noboru*; Kawano, Toshihiko*
JAERI-M 93-205, 52 Pages, 1993/10
no abstracts in English
OShibata, Keiichi; Asami, Tetsuo*; *; Kanda, Yukinori*; Chiba, Satoshi; Nakajima, Yutaka; *
JAERI-M 90-012, 32 Pages, 1990/02
no abstracts in English
Kikuchi, Yasuyuki; Nakagawa, Tsuneo; Asami, Tetsuo; *; *; *
Journal of Nuclear Science and Technology, 22(8), p.593 - 603, 1985/00
Times Cited Count：13 Percentile：47.95(Nuclear Science & Technology)no abstracts in English
La below 2.5keV; *; *; ; ; ; *
Journal of Nuclear Science and Technology, 20(3), p.183 - 190, 1983/00
Times Cited Count：6 Percentile：60.91(Nuclear Science & Technology)no abstracts in English
*; ; *
Journal of Nuclear Science and Technology, 20(8), p.707 - 709, 1983/00
Times Cited Count：1 Percentile：27.09(Nuclear Science & Technology)no abstracts in English
*; *; *; *; Kikuchi, Yasuyuki
Proc.Int.Conf.Nucl.Cross Section for Technol., p.715 - 719, 1980/00
no abstracts in English
U,
U,Pu,
Pu and Pu Adopted in JENDL-1; Preliminary ResultsKikuchi, Yasuyuki; Nakagawa, Tsuneo; *; *; *; *
JAERI-M 6996, 109 Pages, 1977/02
no abstracts in English
*; *
JAERI 1207, 16 Pages, 1972/02
no abstracts in English
Yamashita, Takuma*; Okutsu, Kenichi*; Kino, Yasushi*; Nakashima, Ryota*; Miyashita, Konan*; Yasuda, Kazuhiro*; Okada, Shinji*; Sato, Motoyasu*; Oka, Toshitaka; Kawamura, Naritoshi*; et al.
no journal, ,
A muon () having 207 times larger mass of electron and the same charge as the electron has been known to catalyze a nuclear fusion (CF) between deuteron (d) and triton (t). In this work, we have solved simultaneous reaction rate equations by the 4th-order Runge-Kutta method for the jointed CF cycles in the two layers (H
/D and D/T). The T concentration to maximize the intensities of fusion neutrons and muons emitted to the vacuum will be discussed.
Okutsu, Kenichi*; Kino, Yasushi*; Nakashima, Ryota*; Miyashita, Konan*; Yasuda, Kazuhiro*; Yamashita, Takuma*; Okada, Shinji*; Sato, Motoyasu*; Oka, Toshitaka; Kawamura, Naritoshi*; et al.
no journal, ,
Muon catalized fusion (CF) is expected to be a high-quality muon beam source for undestructive measurement and a monoenergetic neutron source. In this work, we attemped to observe a released muon after intermolecular nuclear reaction using muonic X-ray.
CF experiment at J-PARC MLFOkutsu, Kenichi*; Kino, Yasushi*; Nakashima, Ryota*; Miyashita, Konan*; Yasuda, Kazuhiro*; Yamashita, Takuma*; Okada, Shinji*; Sato, Motoyasu*; Oka, Toshitaka; Kawamura, Naritoshi*; et al.
no journal, ,
Muon catalized fusion (CF) is expected to be a high-quality muon beam source for undestructive measurement and a monoenergetic neutron source. In this work, we discussed how to observe a kinetic energy distribution of a recycling muon emitted after CF reaction.
