A Deformable Shell Model for the Alkali Halides
✍ Scribed by A. N. Basu; S. Sengupta
- Publisher
- John Wiley and Sons
- Year
- 1968
- Tongue
- English
- Weight
- 456 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0370-1972
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📜 SIMILAR VOLUMES
## Abstract Hyper‐Raman scattering by the zone‐centre optical phonons of alkali metal halides is described in terms of an anharmonic shell model. In order to reproduce the measured relative values of the hyper‐Raman tensor elements, three types of fourth‐order coupling parameters, representing intr
## Abstract Group‐theoretical as well as quantum‐mechanical arguments require an extension of Schröder's breathing shell model (BSM) to include axial deformations. An extended model (EBSM) is presented and numerical results are given for KBr and KI. The dispersion curves do not differ appreciably f