
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 nonlocal thermodynamic equilibrium (NLTE) situations. The nonequilibrium 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 planeparallel semiinfinite 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