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PbShizuma, Toshiyuki*; Endo, Shunsuke; Kimura, Atsushi; Massarczyk, R.*; Schwengner, R.*; Beyer, R.*; Hensel, T.*; Hoffmann, H.*; Junghans, A.*; R
mer, K.*; et al.
Physical Review C, 106(4), p.044326_1 - 044326_11, 2022/10
Times Cited Count：3 Percentile：30.20(Physics, Nuclear)no abstracts in English
Takahashi, Yoshiyuki*; Koizumi, Mitsuo
Nihon Genshiryoku Gakkai-Shi ATOMO
, 62(8), p.452 - 456, 2020/08
no abstracts in English
Wakaida, Ikuo; Miyabe, Masabumi
Bunseki, 2004(10), p.585 - 590, 2004/10
no abstracts in English
-raysOmer, M.; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Angell, C.*
no journal, ,
An elastic scattering experiment has been performed using 100% linearly polarized -rays generated by laser Compton backscattering at Duke University, NC, USA. Photons of energy of 2 MeV elastically scattered off uranium target were measured with high-purity Ge detectors. The results are used in the simulation study to improve the sensitivity of identifying isotopes by nuclear resonance fluorescence. Validation of the elastic scattering cross section of a polarized -rays is reported.
-raysShizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo; Seya, Michio
no journal, ,
no abstracts in English
Koizumi, Mitsuo
no journal, ,
no abstracts in English
Seya, Michio
no journal, ,
This oral presentation introduces present status of development activities in Europe, United States of America and in Japan of non-destructive detection technologies, which are required for member states in IAEA Nuclear Security Series No.15 (Nuclear Security Recommendations on Nuclear and Other Radioactive Material out of Regulatory Control). Also, the NDA technologies presently applied to IAEA safeguards as well as development program of spent fuel Pu NDA technologies of NGSI (Next Generation Safeguards Initiative) of DOE are explained. In addition, among development activities of JAEA relating nuclear security and nuclear safeguards, development of laser Compton scattered -ray source and NRF (Nuclear Resonance Fluorescence) -NDA technologies using LCS -rays and also development of NRD (Neutron Resonance Densitometry) technologies are presented.
Shizuma, Toshiyuki*; Endo, Shunsuke; Kimura, Atsushi; Schwengner, R.*; Beyer, R.*; Hensel, T.*; Hoffmann, H.*; Junghans, A.*; Romer, T.*; Turkat, S.*; et al.
no journal, ,
no abstracts in English
Koizumi, Mitsuo
no journal, ,
no abstracts in English
Koizumi, Mitsuo
no journal, ,
no abstracts in English
Koizumi, Mitsuo
no journal, ,
no abstracts in English
Oba, Masaki; Miyabe, Masabumi; Akaoka, Katsuaki; Wakaida, Ikuo
no journal, ,
We used laser-induced fluorescence imaging with a varying beam focal point to observe ablation plumes from metal and oxide samples of gadolinium. The plumes expand vertically when the focal point is far from the sample surface. In contrast, the plume becomes hemispherical when the focal point is on the sample surface. In addition, the internal plume structure and the composition of the ablated atomic and ionic particles also vary significantly. The fluorescence intensity of a plume from a metal sample is greater than that from an oxide sample, which suggests that the number of monatomic species produced in each plume differs. For both the metal and oxide samples, the most intense fluorescence from atomic (ionic) species is observed with the beam focal point at 3-4 mm (2 mm) from the sample surface.
Shizuma, Toshiyuki; Omer, M.; Hajima, Ryoichi
no journal, ,
no abstracts in English
Shizuma, Toshiyuki*; Omer, M.; Hajima, Ryoichi*; Koizumi, Mitsuo; Zen, H.*; Ogaki, Hideaki*; Taira, Yoshitaka*
no journal, ,
no abstracts in English
-raysHajima, Ryoichi; Seya, Michio
no journal, ,
Monochromatic -rays produced by laser Compton scattering could be used for detection of nuclear material with cobined use of nuclear resonance flourescence. By using ERL (Energy Recovery Linac) based -ray source for producing high intensity, it is possible to detect nuclear material inside an heavily shielded object and also to have clear imaging inside of it. In this poster presentation, a prospect of application of the -ray source to nuclear material detection system.
Koizumi, Mitsuo; Omer, M.; Takahashi, Tone; Seya, Michio; Hajima, Ryoichi; Shizuma, Toshiyuki; Hashimoto, Satoshi*; Amano, So*; Miyamoto, Shuji*
no journal, ,
JAEA, QST, and University of Hyogo are developing a nuclear material detection technique that utilizes a measurement method of nuclear resonance fluorescence gamma-ray scattering induced by laser Compton scattering gamma-ray beams, under the subsidiary for "promotion of strengthening nuclear security or the like" of MEXT. So far, experimental apparatus, a laser system, gamma-ray detectors, data acquisition systems, and so on, are prepared for a demonstration experiment to be performed at NEW SBARU facility of University of Hyogo. An imitated nuclear material sample hidden in a shield will be placed on an automatic stage. This presentation overview the purpose of this program, preparation status, plan of demonstration experiments and a workshop.
