Accession Number : AD0865085

Title :   Analyses of Emission Intensity Data for Shock-Heated N2, O2, NO, and Air.

Descriptive Note : Technical rept. Feb 68-May 69,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB

Personal Author(s) : Buttrey, D. E. ; McChesney, H. R.

Report Date : DEC 1969

Pagination or Media Count : 76

Abstract : Existing shock-tube spectral emission data between 2400A and 6000A have been analyzed in conjunction with SACHA code calculations to distinguish between and extract valid radiative constants for the discrete molecular transitions and various radiative continua processes occurring in heated air. The results include: an array of absolute Einstein A(v',v')- values for the First Negative Bands of the singly charged nitrogen molecular ion obtained from spectral photometry; the collision cross section of 3.8 x 10(E - 14) square centimeters from line width arguments; failure to observe any continuum radiation attributable to either the bremmstrahlung process on the neutral nitrogen atom or the photodetachment process for the negatively charged nitrogen atom; an improved array of Franck-Condon factors for the Schumann-Runge bands of molecular oxygen based on the Rydberg-Klein-Rees potential energy function; and a discussion of the NO Beta and NO Gamma emission in high resolution spectral emission data for shock-heated air and NO between 6000 degrees K and 8000 degrees K. (Author)

Descriptors :   (*NITROGEN, EMISSIVITY), (*OXYGEN, EMISSIVITY), (*NITROGEN OXIDES, EMISSIVITY), (*AIR, EMISSIVITY), ATMOSPHERE ENTRY, SHOCK TUBES, ELECTRON TRANSITIONS, BAND SPECTRA, MOLECULAR ENERGY LEVELS, VIBRATION, IONS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA.

Subject Categories : Atmospheric Physics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE