Collision-induced absorption at temperatures of thousands of kelvin, from first principles, for astrophysical applications

Details Collision-induced absorption at temperatures of thousands of kelvin, from first principles, for astrophysical applications Collision-induced absorption at temperatures of thousands of kelvin, from first principles, for astrophysical applications

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1290..219f&link_type=abstract

20TH INTERNATIONAL CONFERENCE ON SPECTRAL LINE SHAPES. AIP Conference Proceedings, Volume 1290, pp. 219-230 (2010).

Computer Science

1

Ab Initio Calculations, Electric Moments, Bond Lengths, Spectra, Excited States, Ab Initio Calculations, Electric And Magnetic Moments, Polarizability, And Magnetic Susceptibility, Interatomic Distances And Angles, Visible And Ultraviolet Spectra, Atomic Excitation And Ionization By Electron Impact

Scientific paper

New ab initio surfaces of the potential energies and the induced electric dipole moments of H2-H2 and H2-He collisional complexes are obtained with H2 bond distances from 0.942 to 2.801 bohr. These data permit the calculation of collision-induced absorption (CIA) spectra of dense hydrogen-helium gas mixtures at temperatures up to thousands of kelvin, i.e., under conditions where strong rotovibrational excitations of the H2 molecules exist. First results of CIA spectra are obtained over an extended range of frequencies and temperatures. The work is an extension of our previous work on the opacities of the (low-temperature) atmospheres of the outer planets.

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