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ABSTRACT

Boulet et al. 2006

Boulet, C., J. Boissoles, R.H. Tipping, and Q. Ma, 2006: On the temperature dependence of the integrated intensity of the collision-induced fundamental band of O2-O2. Molec. Phys., 104, 2753-2758, doi:10.1080/00268970600857792.

The temperature dependence of the integrated intensity of the collision-induced fundamental band of O2-O2 pairs has been investigated. For T < 280 K, most of the intensity has been shown to arise through the long-range isotropic quadrupolar mechanism, which leads to a monotonic decrease with increasing T. Recent observations carried out at higher temperature show a small increase in the integrated intensity as T increases. Assuming that this increase in absorption is due to a short-range isotropic overlap dipole and fitting the theoretically calculated results to the experimental data, reasonable values are obtained for the magnitude and range of this dipole. The assumption is tested by calculating the corresponding spectral profiles, and it is found that these are in good agreement with the experimental measurements over the temperature range from 190 K to 350 K.

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