Cross-section measurement of 237Np (n, γ) from 10 meV to 1 keV at Japan Proton Accelerator Research Complex

Kentaro Hirose, Kazuyoshi Furutaka, Kaoru Y. Hara, Hideo Harada, Atsushi Kimura, Tadahiro Kin, Fumito Kitatani, Mitsuo Koizumi, Shoji Nakamura, Masumi Oshima, Yosuke Toh, Masayuki Igashira, Tatsuya Katabuchi, Motoharu Mizumoto, Takashi Kamiyama, Koichi Kino, Yoshiaki Kiyanagi, Jun Ichi Hori

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Abstract

The cross-section of the 237Np (n; γ) reaction has been measured in the energy range from 10 meV to 1 keV using the ANNRI-NaI(Tl) spectrometer at the Japan Proton Accelerator Research Complex (JPARC). The cross-section was obtained relative to that of the 10B (n; α1) reaction. The absolute value of the cross-section was deduced by normalizing the relative cross-section to the evaluated value of JENDL-4.0 at the first resonance. The thermal cross-section was obtained to be (176.7 ± 0.5sta ± 4.7sys) b. The Maxwellian-averaged cross-section for kT = 25:3 meV was derived as (174.6 ± 0.6sta ± 5.1sys) b by referring the cross-section below 10 meV from JENDL-4.0. These results lead to the Westcott's g-factor of 0.988 ± 0.004sta ± 0.009sys.

Original languageEnglish
Pages (from-to)188-200
Number of pages13
Journaljournal of nuclear science and technology
Volume50
Issue number2
DOIs
Publication statusPublished - Feb 1 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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    Hirose, K., Furutaka, K., Hara, K. Y., Harada, H., Kimura, A., Kin, T., Kitatani, F., Koizumi, M., Nakamura, S., Oshima, M., Toh, Y., Igashira, M., Katabuchi, T., Mizumoto, M., Kamiyama, T., Kino, K., Kiyanagi, Y., & Hori, J. I. (2013). Cross-section measurement of 237Np (n, γ) from 10 meV to 1 keV at Japan Proton Accelerator Research Complex. journal of nuclear science and technology, 50(2), 188-200. https://doi.org/10.1080/00223131.2013.757470