Gamma-ray spectra from thermal neutron capture on gadolinium-155 and natural gadolinium

Tomoyuki Tanaka, Kaito Hagiwara, Enrico Gazzola, Ajmi Ali, Iwa Ou, Takashi Sudo, Pretam Kumar Das, Mandeep Singh Reen, Rohit Dhir, Yusuke Koshio, Makoto Sakuda, Atsushi Kimura, Shoji Nakamura, Nobuyuki Iwamoto, Hideo Harada, Gianmaria Collazuol, Sebastian Lorenz, Michael Wurm, William Focillon, Michel GoninTakatomi Yano

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Natural gadolinium is widely used for its excellent thermal neutron capture cross section, because of its two major isotopes: 155Gd and 157Gd. We measured the γ-ray spectra produced from the thermal neutron capture on targets comprising a natural gadolinium film and enriched 155Gd (in Gd2O3 powder) in the energy range from 0.11 MeV to 8.0 MeV, using the ANNRI germanium spectrometer at MLF, J-PARC. The freshly analyzed data of the 155Gd(n, γ) reaction are used to improve our previously developed model (ANNRI-Gd model) for the 157Gd(n, γ) reaction [K. Hagiwara et al. [ANNRI-Gd Collaboration], Prog. Theor. Exp. Phys. 2019, 023D01 (2019)], and its performance confirmed with the independent data from the natGd(n, γ) reaction. This article completes the development of an efficient Monte Carlo model required to simulate and analyze particle interactions involving the thermal neutron captures on gadolinium in any relevant future experiments.

Original languageEnglish
Article number043D02
JournalProgress of Theoretical and Experimental Physics
Issue number4
Publication statusPublished - Apr 13 2020


  • C42
  • C43
  • D21
  • F20
  • F22
  • H20
  • H43

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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