Acoustical method of obtaining vibrational transition rates tested on CO2/N2 mixtures

Abstract

Sound absorption measurements on 16% and 30% mixtures of CO₂/N₂ at 300 and 600°K illustrate the acoustical method of obtaining transition rates. The rate of N₂ in de‐exciting CO₂(01¹0) is measured to be ${\text{8.0 × 10}}^4\text{± 20 \%}$ and ${\text{5.0 × 10}}^5\text{± 20 \%\hspace{0.17em}}{\mathrm{atm}}^{\text{−1}}{\sec }^{\text{−1}}$ at 300 and 600°K, respectively.