Investigations of Transitions of in Ca
- 10 July 1968
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 171 (2), 361-364
- https://doi.org/10.1103/physrev.171.361
Abstract
The transitions of in Ca crystals are investigated, using thermoluminescence and other optical techniques. the effect of heat treatment on the thermoluminescence, luminescence, and absorption spectra is shown. The differences in spectra between as-received and heat-treated specimens arise from the variation in abundance of rare-earth ion sites of various point symmetries. This variation is caused by oxygen diffusing into the crystals during heat treatment. On cooling to liquid-nitrogen temperature, structure develops on most of these spectra. This structure is discussed and a tentative explanation is suggested.
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