| Numéro |
J. Phys. Colloques
Volume 46, Numéro C10, Décembre 1985
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
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|---|---|---|
| Page(s) | C10-525 - C10-528 | |
| DOI | https://doi.org/10.1051/jphyscol:198510116 | |
Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 46 (1985) C10-525-C10-528
DOI: 10.1051/jphyscol:198510116
1 Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
2 Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan
J. Phys. Colloques 46 (1985) C10-525-C10-528
DOI: 10.1051/jphyscol:198510116
ULTRASONIC STUDY OF DISLOCATIONS IN CsI
H. KOIZUMI1, I. IWASA2 and T. SUZUKI11 Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
2 Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan
Abstract
The ultrasonic velocity and the attenuation in CsI change sensitively with plastic deformation and they recover by γ-irradiation. In the amplitude independent region, the measured results of the temperature and frequency dependences of the change of velocity and the decrement due to dislocations are consistently accounted for by the superposition of the dislocation resonance damping and the relaxation loss of Bordoni type.