Accession Number : AD0642830

Title :   ENERGY LEVELS OF POLYATOMIC MOLECULES. PART ONE.

Descriptive Note : Final rept. 1 Feb 60-31 Jan 66,

Corporate Author : GROUP FOR THE ADVANCEMENT OF SPECTROSCOPIC METHODS PARIS (FRANCE)

Personal Author(s) : Amat,G.

Report Date : 15 MAR 1966

Pagination or Media Count : 84

Abstract : The rotation-vibration energies of polyatomic molecules were computed to the fourth order of approximation. These energies are used to obtain the frequencies of lines in rotation and rotation-vibration spectra. Such very accurate calculations are necessary in order to explain many effects observed in very high resolution spectra. The following topics are emphasized: the quartic anharmonic potential function; the rotation spectrum of axially symmetric molecules in an excited vibrational state; the rotation-vibration spectra of spherical top molecules; anomalous rotational structure of level 03(1)1 in the rotation-vibration spectrum of C(13) O2(16); rotational structure of the fundamental NU6 of methyl cyanide; a general discussion of Fermi resonance in CO2 with a new assignment of vibrational levels. (Author)

Descriptors :   (*POLYATOMIC MOLECULES, *MOLECULAR ENERGY LEVELS), (*INFRARED SPECTROSCOPY, POLYATOMIC MOLECULES), (*MICROWAVE SPECTROSCOPY, POLYATOMIC MOLECULES), LINE SPECTRA, EXCITATION, BAND SPECTRA, CARBON DIOXIDE, ACETONITRILE, RESONANCE, FREQUENCY, FRANCE

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE