Numéro
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
Page(s) C6-493 - C6-495
DOI https://doi.org/10.1051/jphyscol:19816144
International Conference on Phonon Physics

J. Phys. Colloques 42 (1981) C6-493-C6-495

DOI: 10.1051/jphyscol:19816144

ON THE ORIGIN OF THE RED SHIFT OF THE RAMAN EXCITATION PROFILE FROM THE ABSORPTION SPECTRUM

E. Mulazzi1, 2, R. Tubino3 et G. Dellepiane4

1  Istituto di Fisica dell'Università, via Celoria 16, Milano, Italy
2  Gruppo Nazionale Struttura Materia del CNR, Milano, Italy
3  Istituto di Chimica delle Macromolecole del CNR, via Corti, 12, Milano, Italy
4  Istituto di Chimica Fisica, Dipartimento di Chimica, via Elce di Sotto, 8, Perugia, Italy


Abstract
A red shift of the position of the Resonant Raman Scattering excitation profile with respect to the position of the maximum of the electronic absorption band has been observed in a number of compounds. The variation of the inverse vibronic lifetime γn in the excited state with the quantum number n is believed to be the most relevant contribution to the shift of the Raman excitation profile. Calculations based on this model for a molecule in a crystalline matrix are reported.