237Np and 57Fe Mössbauer study of NpFeGa 5

Y. Homma, M. Nakada, A. Nakamura, S. Nasu, D. Aoki, H. Sakai, S. Ikeda, E. Yamamoto, Y. Haga, Y. Onuki, Y. Shiokawa

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1 Citation (Scopus)


57Fe and 237Np Mössbauer Omeasurements have been performed for NpFeGa5, which is one of the so-called neptunium 1-1-5 compounds. The 57Fe Mössbauer spectra below T N = 118 K show the magnetically ordered state. The magnitude of the hyperfine magnetic field at the 57Fe nucleus is determined to be 1.98 ± 0.05 T at 10 K. From the 237Np Mössbauer spectrum at 10 K, the hyperfine magnetic field at the 237Np nucleus is 203 T and the hyperfine coupling constant is determined to be 237 T/μB using the Np atomic magnetic moment of 0.86 μB determined by the neutron diffraction study.

Original languageEnglish
Pages (from-to)1175-1179
Number of pages5
JournalHyperfine Interactions
Issue number1-3
Publication statusPublished - 2006 Feb


  • Fe Mössbauer spectroscopy
  • Hyperfine coupling constant
  • Hyperfine magnetic field
  • Np Mössbauer spectroscopy
  • NpFeGa

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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