Tipping et al. 2005

Tipping, R.H., Q. Ma, C. Boulet, and J.-.M. Hartmann, 2005: Theoretical analysis of the collision-induced electronic absorptions in O₂-N₂ and O₂-CO₂ pairs. J. Molec. Structure, 742, 83-86, doi:10.1016/j.molstruc.2004.11.095.

Theoretical calculations are made for the collision-induced electronic absorption in the atmospheric infrared a←X (0,0) and visible b←X (0,0) bands of oxygen in O₂-N₂ and O₂-CO₂ pairs. We consider only the long-range quadrupolar induction mechanism and use ab initio values for the quadrupole transition matrix elements that arise from spinorbit mixing. By fitting the experimental value for the a←X (0,0) absorption in O₂-N₂, we obtain estimates for the isotropic and anisotropic polarizability electronic transition matrix elements of O₂. As a check, we then use these results together with other known data to calculate the corresponding absorption for O₂-CO₂. We find good agreement, considering experimental error and theoretical approximations. We then estimate the corresponding absorption for the b←X (0,0) absorption in O₂-N₂. We discuss briefly the observed collision-induced absorption by O₂-O₂ pairs, and conclude that there must be other induction mechanisms involved for this system. Because of the importance of absorption by O₂ in the Earth's atmosphere, we conclude that a systematic study, including both additional measurements and theoretical analyses must be carried out before a satisfactory understanding can be attained.

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Tipping, R.H., Ma, Q., Boulet, C., and Hartmann, J.-.M.: Theoretical analysis of the collision-induced electronic absorptions in O₂-N₂ and O₂-CO₂ pairs, J. Molec. Structure, 742, 83-86, doi:10.1016/j.molstruc.2004.11.095, 2005.

Tipping, R.H., Q. Ma, C. Boulet, and J.-.M. Hartmann (2005), Theoretical analysis of the collision-induced electronic absorptions in O₂-N₂ and O₂-CO₂ pairs, J. Molec. Structure, 742, 83-86, doi:10.1016/j.molstruc.2004.11.095.

Tipping, R.H., Q. Ma, C. Boulet, and J.-.M. Hartmann, 2005: Theoretical analysis of the collision-induced electronic absorptions in O₂-N₂ and O₂-CO₂ pairs. J. Molec. Structure, 742, 83-86, doi:10.1016/j.molstruc.2004.11.095.

Tipping, R.H., Ma, Q., Boulet, C., & Hartmann, J.-.M. 2005, J. Molec. Structure, 742, 83, doi:10.1016/j.molstruc.2004.11.095.

Tipping RH, Ma Q, Boulet C, Hartmann J-M. Theoretical analysis of the collision-induced electronic absorptions in O₂-N₂ and O₂-CO₂ pairs, J Molec Structure 2005;742:83-86. doi:10.1016/j.molstruc.2004.11.095.

R.H. Tipping, Q. Ma, C. Boulet, J.-.M. Hartmann, J. Molec. Structure 742, 83-86, doi:10.1016/j.molstruc.2004.11.095 (2005).