Crystal-field splitting, magnetic interaction, and vibronic excitations of {sup 244}Cm{sup 3+} in YPO{sub 4} and LuPO{sub 4}
Journal Article
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· Journal of Chemical Physics
- Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
The electronic and lattice-dynamical properties of {sup 244}Cm{sup 3+} doped orthophosphate crystals of YPO{sub 4} and LuPO{sub 4} were studied using site-selective fluorescence line narrowing (FLN) techniques. Although radiation damage caused substantial inhomogeneous line broadening, FLN gave rise to sharp resonant and satellite lines. Samples were annealed at 500thinsp{degree}C to eliminate satellite lines due to Cm{sup 3+} ions at different lattice environments. The crystal{endash}field splitting of the nominal {sup 8}S{sub 7/2} ground state and the {sup 6}D{sub 7/2} excited state was determined from an analysis of the excitation and fluorescence spectra using an exchange charge model of crystal field interaction within the scheme of intermediate coupling. The effective {ital g} factors of the four Kramers doublets of the J=7/2 ground state and the lowest doublet of the excited state were evaluated from a least-squares fit of the observed Zeeman splitting to an effective-operator Hamiltonian. The energies of phonon modes were estimated from the observed vibronic spectra of the {sup 244}Cm{sup 3+} ion in both hosts and compared with the results of previous optical and neutron measurements. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 662187
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 16 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Wed Oct 01 00:00:00 EDT 1997
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OSTI ID:561237