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Multiphonon absorption in molecular crystals
Author(s) -
Broude V. L.,
Umarov L. M.,
Sheka E. F.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220780133
Subject(s) - phonon , absorption (acoustics) , crystal (programming language) , displacement (psychology) , atom (system on chip) , molecular physics , materials science , absorption spectroscopy , internal energy , normal mode , absorption band , chemistry , atomic physics , optics , condensed matter physics , physics , vibration , quantum mechanics , psychology , computer science , embedded system , psychotherapist , programming language
The classification of molecular crystal multiphonon absorption is suggested taking into account quantitative difference of the energy spectrum of internal and external phonon modes. The experimental observations are given of phonon side bands following the bands of high frequency internal modes of the naphthalene crystal. The absorption observed is considered as a two‐phonon one caused by internal and external mode interaction. The dependence of the phonon side band shapes on the different geometry of the atom displacement for different internal modes is discussed.

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