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Mössbauer investigations on Np3S5 |
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| Authors: | T. Th venin, J. Jov ,M. Pag s |
| Affiliation: | Institut Curie, Laboratorie des Transuraniens associé au C.N.R.S., 11 rue Pierre et Marie Curie, 75231 -, Paris Cedex 05, France D.E.C.Pu/S.E.F.C.A. Centre d'Etudes Nucléaires, BP No.6 - 92260, Fontenay-aux-Roses, France |
| Abstract: | The 59.5 keV Mössbauer resonance of 237Np has been measured in Np3S5 at 77 and 4.2 K. At 77 K, two different quadrupolar splittings are observed. The first one (δ1 = −5(1) mm sec−1/NpAl2) is assigned to the Np4+ ions and the second one (δ2 = 28(1) mm sec−1/NpAl2) is assigned to the Np3+ ions. At 4.2 K the spectrum gives a ratio of areas S(Np3+)/S(Np4+) of 2.0. These results clearly confirm the crystallographic data of this mixed-valence material. |
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