Fluorescence of Cu+in NaCl single crystals
- 10 September 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (25), 4791-4796
- https://doi.org/10.1088/0022-3719/13/25/020
Abstract
Fluorescence spectra of Cu+ impurity centres in sodium chloride are investigated and compared to absorption spectra. Assignments are proposed on the basis of 3d10 to 3d94s transitions for the low-energy part of the spectra and using the perturbed exciton model for the higher-energy bands. A strong temperature dependence of the fluorescence decay is observed. The emission mechanism is shown to involve two excited states in thermal equilibrium, one of them being metastable and responsible for the large increase in the lifetime at low temperatures.Keywords
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