| Autor: |
Hizhnyakov, V., Selg, M., Kink, M., Kink, R., Maksimov, J. |
| Zdroj: |
Journal of Low Temperature Physics; May1998, Vol. 111 Issue 3/4, p709-715, 7p |
| Abstrakt: |
A nonperturbative theory of anharmonic multiphonon decay of strong local vibrations in crystals is presented. The theory predicts a slow–down of the decay at large amplitudes, and its jump–like acceleration near the critical amplitudes of ≍ 0.3 Å. Local vibration with such or larger amplitude is created e.g. on exciting quasi–molecules (localised excitons) $$ Xe_2^* $$ in solid Xe. The time evolution of this vibration manifests itself in the hot luminescence of Xe crystal. A comparison between the calculated and the observed spectra allows one to conclude that the relaxation rate of $$ Xe_2^* $$ in solid Xe has indeed a strong maximum at the amplitude of ≍ 0.3 Å. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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