Vibrational phase and energy relaxation in the broadening of Raman spectral lines in dense media

✍ Scribed by D.J. Diestler

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 574 KB
• Volume: 39
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)85191-3

✦ Synopsis

An explicit quantum-mechanical expression for the linewidth of the isotropic Raman band for a dilute solution of Raman-active molecules in an "inert" solvent is summa&y derived. Line broadeh in such a system vises from two mechanisms: pure vibrariond dephasing, which is due to nearly elastic scattering processes within the solvent lea&g the vi-. brational state of the active molecule essentially unchanged; vibrational energy relaxcrfion, which involves inekzstic transitions, the vibrational state of the active molecule changing. A specific model for &atomic molecules in rare-gas matrices has been deveioped and applied to the case of Nz in Ar. The agreement with experiment is not bad.