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237Np and 57Fe Mössbauer study of NpFeGa5 |
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| Authors: | Y. Homma M. Nakada A. Nakamura S. Nasu D. Aoki H. Sakai S. Ikeda E. Yamamoto Y. Haga Y. Ōnuki Y. Shiokawa |
| Affiliation: | (1) Institute for Materials Research, Tohoku University, Sendai, Japan;(2) Nuclear Science and Engineering Directorate, Japan Atomic Energy Research Institute, Tokai-mura, Japan;(3) Advance Science Research Center, Japan Atomic Energy Research Institute, Tokai-mura, Japan;(4) Graduate School of Science, Osaka University, Osaka, Japan |
| Abstract: | 57Fe and 237Np Mössbauer ōmeasurements 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. |
| Keywords: | NpFeGa5 237Np M?ssbauer spectroscopy 57Fe M?ssbauer spectroscopy hyperfine magnetic field hyperfine coupling constant |
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