Accession Number : AD0607416

Title :   DEPARTURES FROM THE SAHA EQUATION IN AN OPTICALLY THIN NITROGEN GAS,

Descriptive Note : Technical Information Series,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : KULANDER,J. L.

Report Date : SEP 1964

Pagination or Media Count : 136

Abstract : The populations of the excited and ionized states in an ionized nitrogen gas are calculated for various steady state non-local thermodynamic equilibrium (NLTE) situations. The non-equilibrium conditions basically result from the low electron densities considered. A model consisting of 26 energy levels is assumed for the ions NI -NVIII. The geometrical model consists of a plane-parallel semi-infinite optically thin layer which is assumed to be maintained at a fixed electron temperature and is irradiated by an external Planckian field weakened by a dilution factor, W. Specific densities and temperatures for which LTE holds (for the particle occupations) in N are presented. The electrons are assumed to have a Maxwellian distribution. The populations are presented for electron temperatures, and external radiation temperatures between 10,000 and 100,000K for various W's. (Author)

Descriptors :   (*NITROGEN, OPTICAL PROPERTIES), ATOMIC ENERGY LEVELS, EXCITATION, GAS IONIZATION, THERMODYNAMICS, ELECTRON TRANSITIONS, MATHEMATICAL MODELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE