Vibrational properties of the F A (Li+) center in alkali halides |
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| Authors: | M Leblans W Joosen D Schoemaker |
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| Institution: | Physics Department , University of Antwerp (U.I.A.) , Universiteitsplein 1, B-2610 Wilrijk (Antwerp) Belgium F.O.M. Institute for Atomic and Molecular Physics Kruislaan 407, 1098 SJ, Amsterdam, The Netherlands |
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| Abstract: | Abstract The on- or off-axis behavior and the vibrational properties of the F A (Li+) center are investigated in several alkali halides by means of polarized resonant Raman scattering. The observed Raman modes are interpreted and classified according to their nature and frequency. A comparison between on- and off-axis systems and between the vibrational modes of the isolated Li+ and the F A (Li+) center reveals a displacement of the Li+ equilibrium position parallel to the F A (Li+) defect axis and, due to the small impurity size, away from the adjacent F center. |
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| Keywords: | computer simulation surface scattering angular and energy distributions |
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