ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
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 intra-ionic, inter-ionic and Coulomb anharmonicities have to be taken into account. Deducing the non-linear force constants of the short-range inter-ionic interactions from a Born-Mayer potential and supplementing them by exact expressions of their Coulomb Counterparts, it is possible to determine all parameters contributing to hyper-Raman scattering. The model also predicts the third-harmonic generation coefficients in satisfactory agreement with experimental data.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250211209
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