Effects of pressure on optical F-bands in rubidium halides |
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Authors: | Karl Mamola Raymond Wu |
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Institution: | Department of Physics, Dartmouth College, Hanover, NH 03755, U.S.A. |
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Abstract: | High pressure optical absorption measurements have been made on additively colored RbCl and RbBr at pressures up to 10 kbar and on electrolytically colored Rbl up to 4 kbar. The pressure dependence of the F-band produced in RbCl by x-irradiation in the s.c. phase is also reported. Effects of the pressure induced structure transformation in these salts are described. F-band pressure shifts are related to a semi-empirical treatment which takes account of relative ion sizes. A new Ivey law for F-centers in host crystals having the s.c. structure is presented. This relation is established using all available F-band data including those for salts transformed to the s.c. structure by the application of high pressure. |
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