| Numéro |
J. Phys. IV France
Volume 06, Numéro C8, Décembre 1996
ICIFUAS 11Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C8-27 - C8-30 | |
| DOI | https://doi.org/10.1051/jp4:1996803 | |
ICIFUAS 11
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-27-C8-30
DOI: 10.1051/jp4:1996803
Materials Reliability Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303, U.S.A.
© EDP Sciences 1996
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-27-C8-30
DOI: 10.1051/jp4:1996803
Selection Rules for Point-Defect Anelastic Relaxations : Classical versus Quantum Mechanical
W. JohnsonMaterials Reliability Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303, U.S.A.
Abstract
A quantum mechanical analysis of selection rules for point-defect relaxations under an applied stress yields different results than a conventional classical analysis. The difference in the two approaches is illustrated using a simple 4-well model. The classical selection rules are a special case of the quantum mechanical selection rules with the wavefunctions of the reorienting defect atoms highly localized in potential minima, such that off-diagonal matrix elements of the stress perturbation are negligible.
© EDP Sciences 1996