Abstract
An optical spectral hole-burning technique has been used in study of the hyperfine and nuclear quadrupole interactions of in . Previous work on in [Phys. Rev. B 53, 2385 (1996)] provided an analysis of the nuclear quadrupole interaction in the ground state and predicted an anomalous nuclear quadrupole interaction in the optically excited state . In the present work on doped into , hyperfine energy levels in both the ground state and the excited state of an 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 excited state of in . 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 excited state is much smaller than that in the ground state, because the first order nuclear quadrupole interaction with the 5f electrons is canceled in part by the contribution from the lattice interaction.
- Received 18 November 1996
DOI:https://doi.org/10.1103/PhysRevB.55.8967
©1997 American Physical Society