Title: Unusual Electric Field Gradient Variation in the NpPd2Ge2 Compound
Citation: Journal of Physics - Conference Series vol. 273 no. 1 p. 012022 (1-4)
Publisher: Institute of Physics (IOP)
Publication Year: 2011
JRC N°: JRC62611
ISSN: 1742-6588 (print), 1742-6596 (online)
URI: http://iopscience.iop.org/1742-6596/273/1
DOI: 10.1088/1742-6596/273/1/012022
Type: Articles in periodicals and books
Abstract: NpPd2Ge2 has been studied by 237Np Moessbauer spectroscopy between 4.2 K and 80 K. The value of the isomer shift suggests a Np3+ electronic configuration. The low temperature spectra provide a value of 2.10 μB for the magnetic ordered moment on the Np site. These values suggest a rather localized character of the 5f electrons in this system. The magnetic transition around 60 K is accompanied by a large increase of the quadrupolar interaction that is evidence of a redistribution of the electronic charges around the neptunium nucleus.
JRC Directorate:Nuclear Safety and Security

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