Collision broadening of 0,0→1,0 rotational line of CH₃⁸¹Br. I. Broadened by polar molecules

Abstract

Widths of JK 0,0 to 0,1 rotational line of the symmetric top molecule CH₃⁸¹Br broadened by polar molecules CH₃Br, OCS and CH₃CN have been measured on a double modulation microwave spectrograph. The experimental data have been compared with the theoretical values as calculated by the Anderson- Tsao-Curnutte theory and Murphy and Boggs' theory taking only dipole-dipole interaction. The theoretical widths obtain from the Anderson-Tsao-Curnutte theory are larger than the experimental values whereas those from Murphy and Boggs theory are somewhat nearer to the measured values.