| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-119 - C6-121 | |
| DOI | https://doi.org/10.1051/jphyscol:1981635 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-119-C6-121
DOI: 10.1051/jphyscol:1981635
Institut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
J. Phys. Colloques 42 (1981) C6-119-C6-121
DOI: 10.1051/jphyscol:1981635
OBSERVATION OF STRONGLY FREQUENCY DEPENDENT LIFETIMES OF ACOUSTIC PHONONS IN CaF2
R. Baumgartner, M. Engelhardt et K.F. RenkInstitut für Angewandte Physik, Universität Regensburg, 8400 Regensburg, F.R.G.
Abstract
A strongly frequency dependent lifetime of acoustic phonons in CaF2 at low crystal temperature is observed. The phonon lifetime decreases proportionally to ν-5 indicating spontaneous phonon decay. Furthermore, we report measurements of the spectral distribution of phonons generated by nonradiative transitions.