Abstract
Sound absorption measurements in pure D2S at 300° and 400°K indicate a vibrational relaxation with a relaxation time of 4.8 × 10−8 sec⋅atm, which is independent of temperature. The mixture measurements, when compared with theoretical curves calculated for a series relaxation process, indicate that energy is exchanged between the excited vibrational levels of the two molecules. The results confirm the theory that the bending vibration in CO2 exchanges energy primarily with the rotational motion of the D2O molecule in a collision.
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