Neutral bremsstrahlung from molecular hydrogen and nitrogen

Details Neutral bremsstrahlung from molecular hydrogen and nitrogen Neutral bremsstrahlung from molecular hydrogen and nitrogen

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....67..395j&link_type=abstract

Astronomy and Astrophysics, vol. 67, no. 3, July 1978, p. 395-398.

Astronomy and Astrophysics

Astrophysics

2

Bremsstrahlung, Hydrogen Ions, Molecular Gases, Nitrogen, Stellar Atmospheres, Absorptivity, Electron Scattering, Molecular Absorption, Opacity, Particle Collisions

Scientific paper

Free-free absorption coefficients of the negative ions H2(-) and N2(-) are calculated using continuum wave-function data recently determined for e-H2 and e-N2 scattering. The target molecule is assumed to be in its equilibrium ground-state configuration during radiative transitions, and the Born-Oppenheimer approximation is adopted. The resulting absorption coefficients are given for a range of temperature and frequency, and are compared with the scaled absorption coefficients determined previously by various other workers. It is concluded that the H2(-) calculations are probably the most accurate available at the present time, the N2(-) results are less satisfactory, and momentum-loss data for N2(-) may be more reliable. The results are fitted to an analytical expression for convenience in model-atmosphere calculations.

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