Spectral hole-burning study of hyperfine and nuclear quadrupole interactions of {sup 243}Am{sup 3+} in CaWO{sub 4}

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.8967· OSTI ID:565260

Liu, G K ^[1]; Huang, J ^[2]; Abraham, M M ^[3]

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1. Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Department of Physics and Astronomy, University of Wisconsin at Eau Claire, Eau Claire, Wisconsin 54702 (United States)
3. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

An optical spectral hole-burning technique has been used in study of the hyperfine and nuclear quadrupole interactions of {sup 243}Am{sup 3+} in CaWO{sub 4}. Previous work on {sup 243}Am{sup 3+} in LaCl{sub 3} [Phys. Rev. B {bold 53}, 2385 (1996)] provided an analysis of the nuclear quadrupole interaction in the {sup 7}F{sub 0} ground state and predicted an anomalous nuclear quadrupole interaction in the optically excited state {sup 5}D{sub 1}. In the present work on {sup 243}Am{sup 3+} doped into CaWO{sub 4}, hyperfine energy levels in both the {sup 7}F{sub 0} ground state and the {sup 5}D{sub 1} excited state of an {sup 243}Am{sup 3+} ion have been resolved in spectral hole-burning experiments. A theoretical analysis is reported for the hyperfine and nuclear quadrupole interactions in the non-Kramers doublet of the {sup 5}D{sub 1} excited state of {sup 243}Am{sup 3+} in CaWO{sub 4}. Whereas the crystal-field antishielding effect dominates the ground state nuclear quadrupole splitting, a first order electronic hyperfine interaction dominates the excited state splitting. It is shown that the contribution from the nuclear electric quadrupole interactions in the {sup 5}D{sub 1} excited state is much smaller than that in the {sup 7}F{sub 0} ground state, because the first order nuclear quadrupole interaction with the 5f electrons is canceled in part by the contribution from the lattice interaction. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 565260
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMERICIUM
CALCIUM COMPOUNDS
CRYSTAL FIELD
DOPED MATERIALS
HYPERFINE STRUCTURE
QUADRUPOLE MOMENTS
TUNGSTATES
optical hole burning