Neutron Beam Technology Team

Team Leader

Yoshié Otake


Yoshié Otake


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Neutron Beam Technology Team,
RIKEN Center for Advanced Photonics

#S201,202,203 Neutron Application Facilities,
2-1 Hirosawa, Wako, Saitama 351-0198 Japan

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RIKEN has developed accelerator-driven compact pulse neutron systems for practical use in industrial applications and non-destructive infrastructure inspection. They are called RIKEN accelerator-driven compact neutron source (RANS) and RANS2. RANS has succeeded to develop non-destructive inspection methods with slow and fast neutrons. One is the visualization method of the corrosion and its related water movement of painted steels and the analytical method of the quantitative estimation of the water movement in the painted steels, the other is the neutron engineering diffractometer for the texture evaluation and the austenite volume fraction estimation of iron and steel. The others are the fast neutron imaging applications. Novel reflected neutron imaging method to see through the fracture in the concrete slab has been successfully developed. The compact neutron system is expected to be widely used on-site.


Physics, Engineering, Interdisciplinary science and engineering


Accelerator-based compact neutron system, Characterization of microstructure and texture evaluation in steels, Research and development of non-destructive inspection for infrastructures, Visualization of water and air hole in concrete slabs, Detection of salt damage in the concrete by prompt-gamma neutron activation analysis


  1. Research and development of compact neutron system for practical use at anytime, anywhere
  2. Realization of the on-site use compact neutron system
  3. Non-destructive test technology for infrastructure
  4. Characterization of microstructure in steels by compact neutron source

The future imaging of compact neutron non-destructive test system on-site

Selected Publications

  1. Wakabayashi, Y., Yoshimura, Y., Mizuta, M., Ikeda, Y., and Otake, Y.: “Feasibility Study of Nondestructive Diagnostic Method for Chlorine in Concrete by Compact Neutron Source and PGA”, Journal of Advanced Concrete Technology, Volume 17, No.10, pp.571-578, (2019/10/12)
  2. Taketani, A., Wakabayashi, Y., Otake, y., Ikeda, Y., Wakabayashi, T., Kono, K., Kai, T., Oikawa, K., Sunaga, H., Yamada, M., and Nakayama, T.: “Quantification of Localized Water Image in Under-Film Corroded Steel with High Spatial Resolution, High Time Resolution, and Wide View by Neutron Radiography”, J MATERIALS TRANSACTIONS,Vol.59 No.6 pp.976-983, (2018)
  3. Wakabayashi, y., Taketani, A., Hashiguchi, T., Ikeda, Y., Kobayashi, T., Sheng Wang, Mingfei Yan, Harada, M., Ikeda, Y., and Otake, Y.: “A function to provide neutron spectrum produced from the 9Be + p reaction with protons of energy below 12 MeV[J].”, Journal of Nuclear Science and Technology, Vol. 55 pp.859-867, (2018)
  4. Ikeda, Y., Otake, Y., and Mizuta, M.: “Nondestructive measurement for water and voids in concrete with compact neutron source”, Plasma and Fusion Research,Vol.13 pp.2406005-1-5, (2018.3) DOI:10.1585/pfr.13.2406005
  5. Ikeda, Y., Takamura, M., Hakoyama, T., Otake, Y., Kumagai, M., and Suzuki:, H.: “Development of On-site measurement Technique of Retained Austenite Volume Fraction by Compact Neutron Source RANS 小型中性子源の現場利用を目指した残留オーステナイト相分率測定手法の開発”, Tetsu to Hagane,vol.104, No.3 pp.18-24, (2018).


Yoshie OtakeTeam Leader
Atsushi TaketaniDeputy Team Leader
Masato TakamuraSenior Scientist
Tomohiro KobayashiSenior Research Scientist
Yasuo WakabayashiResearch Scientist
Maki MizutaResearch Scientist
Takaoki TakanashiResearch Scientist
Chihiro IwamotoResearch Scientist
Kunihiro FujitaResearch Scientist
Shota IkedaPostdoctoral Researcher
Makoto FujinoVisiting Scientist
Makoto GotoTechnical Staff Ⅱ
Yoshio MatsuzakiTechnical Staff Ⅱ
Haruhiko HashikuraTechnical Staff Ⅱ