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RIKEN Center for Advanced Photonics Neutron Beam Technology Team

Team Leader: Yoshie Otake (D.Sc.)

Research Summary

Yoshie  Otake

RIKEN has developed accelerator-driven compact pulse neutron systems for practical use of industrial applications and infrastructure non-destructive inspection with the names of RANS (RIKEN Accelerator-driven compact neutron sources). 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.

Main Research Fields

  • Engineering

Related Research Fields

  • Complex Systems
  • Physics


  • Accelerator-based compact neutron system
  • Non-destructive inspection system
  • Texture evaluation observation
  • Research and development of non-destructive inspection for infrastructures
  • Detection of salt damage in the concrete by prompt-gamma neutron activation analysis

Selected Publications

  • 1. Iwamoto, C., Takamura, M., Ueno, K., Kataoka, M., Kurihara, Ryo., Xu, P.G.,and Otake, Y.:
    "Improvement of Neutron Diffraction at Compact Acceleratordriven Neutron Source RANS Using Peak Profile Deconvolution and Delayed Neutron Reduction for Stress Measurements"
    ISIJ International, Vol. 62, No. 5, pp. 1013–1022(2022).
  • 2. Yan, M., Ma, B., Hashiguchi, T., Taketani, A., Iwamoto, C., Wakabayashi, Y., Fujita, K., Takanashi, T., Takamura, M., Kobayashi, T., Ikeda, S., Mizuta, M., Ikeda, Y., and Otake., Y.:
    "Investigation of Dose Rate Distribution in an Experimental Hall of a RIKEN Accelerator-Driven Compact Neutron Source Based on the ⁹Be(p, n) Reaction With 7 MeV Proton Injection"
    IEEE. Trans. Nucl .Sci. Volume 69, Issue 2, pp118-125 (2022).
  • 3. Watanabe, A., Nakai, S., Wada, Y., Sekiguchi, K., Deltuva, A., Akieda, T., Etoh, D., Inoue, M., Inoue, Y., Kawahara, K., Kon, H., Miki, K., Mukai, T., Sakai, D., Shibuya, S., Shiokawa, Y., Taguchi, T., Umetsu, H., Utsuki, Y., Watanabe, M., Goto, S.,  Hatanaka, K., Hirai, Y., Ino, T., Inomoto, D., Inoue, A., Ishikawa, S., Itoh, M., Kanda, H., Kasahara, H., Kobayashi, N., Maeda, Y., Mitsumoto, S., Nakamura, S., Nonaka, K., Ong, J. H., Oshiro, H., Otake, Y., Sakai, H., Taketani, A., Tamii, A., Tran, T. D., Wakasa, T., Wakabayashi, Y., and Wakui T.:
    "Proton- 3He elastic scattering at intermediate energies"
    Phys. Rev. Vol.C 103, pp44001-1-9(2021).
  • 4. Kobayashi, T., Ikeda, S., Otake, Y., Ikeda, Y., and Hayashizaki, N.:
    "Completion of a new accelerator-driven compact neutron source prototype RANS-II for on-site use"
    Nucl. Instrum. Methods Phys. Res. A. Vol.994,165091 pp1-6(2021).
  • 5. Ma, B., Teshigawara, M., Wakabayashi, Y., Yan, M., Hashiguchi, T., Yamagata, Y., Wang, S., Ikeda, Y., and Otake, Y.:
    "Optimization of a slab geometry type cold neutron moderator for RIKEN accelerator-driven compact neutron source"
    Nucl. Instrum. Methods Phys. Res. A. Vol.995,165079. pp1-7(2021).
  • 6. Otake, Y.:
    "RIKEN Accelerator-driven compact Neutron systems, RANS project -RANS, RANS-II, III, RANS-μ-"
    J. Neutron Res. vol. 23, no. 2-3, pp.119-125, (2021).
  • 7. Wakabayashi, Y., Yan, M., Takamura, M., Ooishi, R., Watase, H., Ikeda, Y., and Otake, Y.:
    "Conceptual study of salt-meter with 252Cf neutron source for on-site inspection of bridge structure"
    J. Neutron Res. vol. 23, no. 2-3, pp. 207-213(2021).
  • 8. Xu, P.G., Ikeda, Y., Hakoyama, T. , Takamura, M. , Otake, Y. , and Suzuki, H.:
    "In-house texture measurement using a compact neutron source"
    J Appl Crystallogr Vol.53 , pp444-454 (2020)
  • 9. Ikeda, S., Otake, Y., Kobayashi, T., and Hayashizaki, N.:
    "“Design of 500MHz RFQ linear accelerator for a compact neutron source,RANS-III"
    Nucl. Instrum. Methods Phys. Res. A. Vol. 461,pp186–190, (2019).

Recent Research Results

Related Links

Lab Members

Principal investigator

Yoshie Otake
Team Leader

Core members

Tomohiro Kobayashi
Senior Research Scientist
Yasuo Wakabayashi
Research Scientist
Maki Mizuta
Research Scientist
Takaoki Takanashi
Research Scientist
Chihiro Iwamoto
Research Scientist
Yasuki Okuno
Research Scientist
Shota Ikeda
Postdoctoral Researcher

Contact Information

Neutron Application Facilities,
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: yotake [at] riken.jp