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-particle preformation in 
Ti probed by the (
,
) reactionTaniguchi, Yasutaka*; Yoshida, Kazuki; Chiba, Yohei*; Kanada-En'yo, Yoshiko*; Kimura, Masaaki*; Ogata, Kazuyuki*
Physical Review C, 103(3), p.L031305_1 - L031305_5, 2021/03
Times Cited Count：11 Percentile：86.51(Physics, Nuclear)Based on the Ti(,)
Ca reaction analysis, this study reports that -particle formation in the medium-mass Ti nucleus is pronounced more compared to that expected through mean-field approximations. Moreover, the estimated average distance between the particle and residue equals approximately 4.5 fm. This result poses a challenge to describe the four nucleon correlations using microscopic nuclear models.
Ne(,)
O reaction as a means of probing the surface amplitudeYoshida, Kazuki; Chiba, Yohei*; Kimura, Masaaki*; Taniguchi, Yasutaka*; En'yo, Yoshiko*; Ogata, Kazuyuki*
Physical Review C, 100(4), p.044601_1 - 044601_6, 2019/10
Times Cited Count：13 Percentile：78.7(Physics, Nuclear)The proton-induced knockout reaction is one of the reaction probes for the clustering. However, it was reported that the theoretical description of the reaction cannot reproduce experimental data. In this work, we describe the Ne(,)O reaction within the distorted wave impulse approximation with a -O cluster wave function constructed by the antisymmetrized molecular dynamics. We show that the Ne(,)O cross section is quantitatively well reproduced by the present framework without any adjustable parameters. This success demonstrates that the proton-induced knockout reaction is a quantitative probe for the clustering.
) irradiated with helium ion beamChiba, Naoki*; Arakawa, Kozue*; Itabashi, Takeru*; Nakamura, Shigeo*; Takahashi, Nobuyuki*; Iwasaki, Yasunaga*; Yoshihara, Ryohei; Nozawa, Shigeki; Hase, Yoshihiro; Narumi, Issei
JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 72, 2009/12
no abstracts in English
) using ion beam irradiationChiba, Naoki*; Arakawa, Kozue*; Nakamura, Shigeo*; Iwasaki, Yasunaga*; Yoshihara, Ryohei; Hase, Yoshihiro; Narumi, Issei
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 78, 2008/11
no abstracts in English
AlOzawa, Akira*; Matsuta, Kensaku*; Nagatomo, Takashi*; Mihara, Mototsugu*; Yamada, Kazunari*; Yamaguchi, Takayuki*; Otsubo, Takashi*; Momota, Sadao*; Izumikawa, Takuji*; Sumikama, Toshiyuki*; et al.
Physical Review C, 74(2), p.021301_1 - 021301_4, 2006/08
Times Cited Count：43 Percentile：89.18(Physics, Nuclear)no abstracts in English
Chiba, Naoki*; Itabashi, Takeru*; Arakawa, Kozue*; Nakamura, Shigeo*; Takahashi, Nobuyuki*; Iwasaki, Yasunaga*; Nozawa, Shigeki; Yoshihara, Ryohei; Hase, Yoshihiro; Narumi, Issei
no journal, ,
no abstracts in English
Yoshida, Kazuki; Taniguchi, Yasutaka*; Chiba, Yohei*; Kimura, Masaaki*; En'yo, Yoshiko*; Ogata, Kazuyuki*
no journal, ,
In this presentation I will discuss the investigation on cluster states through knockout reaction cross section analyses, Ne and Ti in particular. The cluster states of these nuclei are described by the Antisymmetrized Molecular Dynamics (AMD), and the Distorted Wave Impulse Approximation (DWIA) is adopted as a reaction theory. Within the framework of these structure and reaction theories, the theoretical knockout reaction cross section is calculated and the comparison between existing data is discussed.
Oka, Toshitaka; Takahashi, Atsushi*; Koarai, Kazuma; Ono, Takumi*; Tamaki, Hiroaki*; Kino, Yasushi*; Sekine, Tsutomu*; Shimizu, Yoshinaka*; Chiba, Mirei*; Suzuki, Toshihiko*; et al.
no journal, ,
Releases of the radioactive materials from the Fukushima Daiichi Nuclear Power Plant accident result in an ionization exposure to people and animals, the precise dosimetry is required. To estimate the external dose due to the accident, we utilize electron spin resonance (ESR) spectroscopy which is a powerful tool for the dosimetry of external dose. The detection limit of this technique was 146 mGy, so that we have to improve the detection limit for the precise dosimetry. In this work, we developed a novel enamel-dentine separation technique and improved the detection limit down to 43 mGy, and estimated the external dose for Japanese macaque and Procyon lotor collected in Fukushima prefecture.
Oka, Toshitaka; Takahashi, Atsushi*; Koarai, Kazuma; Mitsuyasu, Yusuke*; Ono, Takumi*; Tamaki, Hiroaki*; Kino, Yasushi*; Sekine, Tsutomu*; Shimizu, Yoshinaka*; Chiba, Mirei*; et al.
no journal, ,
Release of the radioactive materials from Fukushima Daiichi Nuclear Power Plant accident results in a long-term low dose rate ionization exposure to wild animals. The biological effects of the wild animal do not show a clear correlation with the external dose, which is estimated from the external dose rate of the captured point of the animal, a precise external dose estimation using ESR and tooth enamel is required instead of using the external dose rate. In this work, we attempted to estimate the external dose of wild Japanese macaque and Procyon lotor captured in the high dose rate area.
Oka, Toshitaka; Mitsuyasu, Yusuke*; Takahashi, Atsushi*; Koarai, Kazuma; Kino, Yasushi*; Sekine, Tsutomu*; Okutsu, Kenichi*; Yamashita, Takuma*; Shimizu, Yoshinaka*; Chiba, Mirei*; et al.
no journal, ,
Releases of the radioactive materials from the Fukushima Daiichi Nuclear Power Plant accident result in a low dose exposure to wild animals. The external dose of wild animals is commonly estimated by the external dose rate of the captured point, but the estimated exposure dose has huge uncertainties because the size of the habitat and/or the movement of the wild animals are not included in the estimation. To estimate the external dose precisely, we utilize electron spin resonance (ESR) dosimetry. In this work, we investigated the sample preparation procedure of wild animals. The ESR spectrum of enamel of racoon captured in Namie-town, Fukushima has a broad ESR signal due to metal components. The linear relationship between the Co
intensity and the absorbed dose that we can apply ESR dosimetry for racoon teeth. Using this relationship, the external exposure dose was estimated.
Oka, Toshitaka; Takahashi, Atsushi*; Mitsuyasu, Yusuke*; Koarai, Kazuma; Kino, Yasushi*; Okutsu, Kenichi*; Yamashita, Takuma*; Sekine, Tsutomu*; Shimizu, Yoshinaka*; Chiba, Mirei*; et al.
no journal, ,
Electron spin resonance (ESR) dosimetry technique is a powerful tool that has been used in the study of external exposure dose assessment of human by measuring CO radicals of teeth. In this work, we applied this technique for wild monkey and wild racoon captured in Fukushima prefecture, and estimated the external exposure dose.
