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Neutron spectroscopy was performed on a sample of PuO(2), enriched to 94% with the non-absorbing isotope 242Pu, to measure the crystal-field potential. The levels obtained are consistent with the weak-field case crystal-field parameters recently derived for UO(2) and NpO(2), but are inconsistent with a weak-field interpretation of the magnetic susceptibility measurements on PuO(2). In the light of these discrepancies it is concluded that the conventional crystal-field model is inadequate. PuO(2) is probably the simplest material for testing new hypotheses because its ground state is a non-magnetic singlet.

Additional information

Authors: KERN S, Colorado State University, Department of Physics, Fort Collins (US);LOONG C-K, Argonne National Laboratory, Argonne (US);GOODMAN G L, Argonne National Laboratory, Argonne (US);CORT B, Los Alamos National Laboratory, Los Alamos (US);LANDER G H, JRC Karlsruhe (DE)
Bibliographic Reference: Article: Journal of Physics: Condensed Matter, Vol. 2 (1990) pp. 1933-1939
Record Number: 199011870 / Last updated on: 1994-12-02
Original language: en
Available languages: en