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O
submicron spherical particlesKobayashi, Satoru*; Nomura, Eiji*; Chiba, Momoko*; Kawamura, Yukihiko*; Oishi, Kazuki*; Hiroi, Kosuke; Suzuki, Junichi*
Journal of Magnetism and Magnetic Materials, 569, p.170410_1 - 170410_9, 2023/03
Times Cited Count：0 Percentile：0(Materials Science, Multidisciplinary)
O
submicron particles studied by polarized small-angle neutron scatteringNomura, Eiji*; Chiba, Momoko*; Matsuo, Sakoto*; Noda, Chiaki*; Kobayashi, Satoru*; Manjanna, J.*; Kawamura, Yukihiko*; Oishi, Kazuki*; Hiroi, Kosuke; Suzuki, Junichi*
AIP Advances (Internet), 12(3), p.035034_1 - 035034_5, 2022/03
Times Cited Count：3 Percentile：34.67(Nanoscience & Nanotechnology)
-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：82.58(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：77.09(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.
Yamamoto, Akio*; Chiba, Go*; Kirimura, Kazuki*; Miki, Yosuke*; Yokoyama, Kenji
Nihon Genshiryoku Gakkai-Shi ATOMO
, 60(4), p.241 - 245, 2018/04
no abstracts in English
Ho by the (
,
) reaction from Laser Compton scattering rays at the electron storage ring NewSUBARUHayakawa, Takehito; Shizuma, Toshiyuki; Miyamoto, Shuji*; Amano, So*; Horikawa, Ken*; Ishihara, Kazuki*; Mori, Michiaki; Kawase, Keigo; Kando, Masaki; Kikuzawa, Nobuhiro; et al.
Physical Review C, 77(6), p.068801_1 - 068801_4, 2008/06
Times Cited Count：12 Percentile：60.96(Physics, Nuclear)no abstracts in English
Sr@C60 by nuclear recoil using high energy neutronsMiyashita, Yuka*; Akiyama, Kazuhiko*; Hatsukawa, Yuichi; Chiba, Kazuki*; Tadai, Tomohiro*; Sato, Yuta*; Kubuki, Shiro*
no journal, ,
Metallofullerene is one of promising material for the drug delivery system transporting useful encapsulated atoms, such as radioisotopes, with their characteristic cage-like structure. The methods to synthesize radioactive metallofullerenes are, for example, to irradiate cold metallofullerenes by thermal neutrons in a nuclear reactor and to prepare metallofullerene by an arc discharge method using radioisotopes created by an accelerator. However, the radioactive metallofullerenes synthesized these methods are including many amount of non-radioactive carriers and radioisotopes are dispersed into not only targeted fullerene species but also various kind of other species. In this study, we tried to synthesize radioactive metallofullerenes of carrier-free and single molecular species using the nuclear recoil technique by high energy neutron irradiation.
Miyashita, Yuka*; Akiyama, Kazuhiko*; Hatsukawa, Yuichi; Tadai, Tomohiro*; Chiba, Kazuki*; Sato, Yuta*; Kubuki, Shiro*
no journal, ,
To obtain an endohedral metallofullerenes with high specific radioactivity using nuclear recoil phenomena, many experiments have been performed so far. However, production yield of metallofullerene by nuclear recoil using high LET radiation was found to be very small because radiation damages to targeted fullerene molecule were not negligible. In order to increase the yield of radioactive metallofullerenes, it is very promising to employ the recoil of nuclear reaction by fast neutron from the viewpoint of reducing the radiation damage. In this session, we will report the synthesis of Sr@C
using nuclear recoil of 
Sr (n,2n) Sr reaction by 14 MeV fast neutron. Mixture of C with strontium salts such as Sr(NO)
and SrCO were employed for the target materials. These samples were irradiated by fast neutron in Fusion Neutronics Source at Japan Atomic Energy Agency. After the irradiation, CS, aniline, and HCl
were passed through the irradiated samples on the filter to dissolve C, Sr@C, and strontium salts, respectively. The -ray from these solutions were measured by Ge detector. As a result, about 0.75% of radioactivity was observed in the aniline solution from SrCO sample. This result strongly suggests that Sr@C was efficiently produced by fast neutron irradiation of SrCO/C target.
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.
Kono, Taiki*; Fujio, Kazuki*; Minato, Futoshi; Ishizuka, Chikako*; Chiba, Satoshi*
no journal, ,
no abstracts in English
