Abstract
IN connexion with attempts to incorporate more divalent (rather than trivalent) samarium into calcium fluoride single crystals, and thereby make them more efficient optical maser materials1, we have observed changes in the electron spin resonance and optical absorption bands of X-irradiated samarium-doped fluorite crystals, which indicate that by ionizing radiation the valency of the samarium may be adjusted in a favourable manner after the samarium has been incorporated in the crystal.
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References
Sorokin, P. P., and Stevenson, M. J., IBM J. Research and Develop., 5, 56 (1961).
Guggenheim, H., J. App. Phys., 32, 1337 (1961).
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KONITZER, J., LONGO, J., JARKA, R. et al. Irradiation Control of Oxidation State in Fluorite Crystals containing Samarium. Nature 193, 157–158 (1962). https://doi.org/10.1038/193157a0
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DOI: https://doi.org/10.1038/193157a0
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