Abstract
Sharp-line luminescence has been observed for () in single crystals of Zr and Hf at low temperature. Well-resolved vibronic structure is seen, forming nearly perfect mirror symmetry between emission and absorption about a zero-phonon line at 13 879 . Using the assignments of Dorain and Wheeler, these are identified as being due to transitions within the configuration from the level to the ground state . Vibrational energies of the odd modes of the Re complex are found to be the same for both the ground and excited states. The flourescence lifetime of 100 μsec at 2 K suggests the presence of other modes of decay than the observed luminescence. The luminescence can be excited either by transitions into the electric dipole allowed levels arising from configuration or to the , () levels.
- Received 9 October 1969
DOI:https://doi.org/10.1103/PhysRevB.1.2085
©1970 American Physical Society