Accession Number : AD0660908

Title :   NON-EQUILIBRIUM SOLUTIONS FOR THE RADIATIVE DECAY OF A SYSTEM OF OSCILLATORS, HARMONIC AND ANHARMONIC,

Corporate Author : UTAH STATE UNIV LOGAN ELECTRO-DYNAMICS LABS

Personal Author(s) : Zitlau,Carl F. ; Moore,William M.

Report Date : 01 AUG 1967

Pagination or Media Count : 141

Abstract : The non-equilibrium vibrational energy distribution function was derived for a low pressure model in which the oscillators can exchange vibrational energy, radiate their energy irreversibly, and be irreversibly destroyed by some constant process. Initial Boltzmann and delta-function distribution using the Landau-Teller harmonic oscillator transition probabilities give solutions that are not of the Boltzmann form with a time dependent temperature. However this solution under conditions such that collisional vibrational exchange is much faster than the radiations is Boltzmann as well as the solution for the other extreme in which there are no interactions if the initial distribution is Boltzmann. Also the effect of nonlinear first overtone radiative transitions is investigated under time-dependent Boltzmann equilibrium conditions and found to be negligible for a typical molecule such as carbon monoxide. (Author)

Descriptors :   (*MOLECULAR ENERGY LEVELS, DISTRIBUTION FUNCTIONS), GASES, ENERGY, IRREVERSIBLE PROCESSES, MOMENTS, MOLECULAR SPECTROSCOPY, ELECTRON TRANSITIONS, PROBABILITY, EMISSIVITY, BAND SPECTRA, INTENSITY

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE