Collision-induced emission in the fundamental vibration-rotation band ofH2

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Abstract
Measurements of collision-induced emission in the fundamental vibration-rotation band of hydrogen are presented for argon, xenon, and neon collision partners. These absolute, spectrally resolved infrared measurements were performed at high densities behind reflected shock waves over the temperature range of 900–3400 K. The emission was found to be dominated by Q-branch transitions at high temperature due primarily to the dipole moment induced by the overlap between the electron clouds of the collision pair. The strength of this interaction was evaluated from the data and compared with similar evaluations determined from low-temperature absorption studies.