MANIFESTATION OF ELECTRODYNAMIC FORBIDDANCE OF THE QUADRUPOLE SERS MECHANISM IN THE METHANE MOLECULE

In the framework of the SERS theory, suggested by the author and based on the conception of so-called strong quadrupole interaction of radia tion with molecules, the SER cross-section of the methane molecule is considered. It is demonstrated that a major part of the scattering, ca used by the quadrupole moments and responsible for intense SERS, vanis hes due to some electrodynamical forbiddance. The theoretical result i s applied to the interpretation of the SER spectrum of the methane mol ecule and can explain slight enhancements of its bands.