J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-505 - C6-507|
J. Phys. Colloques 42 (1981) C6-505-C6-507
PHONONS IN RESONANT SECONDARY EMISSION OF IMPURITY MOLECULES IN CRYSTALSL.A. Rebane et K.K. Rebane
Institute of Physics of the Estonian SSR Academy of Sciences, Tartu, U.S.S.R.
Resonant Raman scattering (RS), hot luminescence (HL) and ordinary luminescence (OL) were studied in the spectra of S2 and Se2 impurity molecules in KI at various frequencies of laser excitation and temperatures. Characteristic times of phase relaxation in the excited electronic state caused by phonon scattexing were estimated. In contradiction with the simple version of the RSE theory no resonance in the Raman scattering cross section was observed when the excitation frequency was close or in resonance with a sharp no-phonon absorption line.