Pressure-broadened linewidths of ozone

Abstract

Self‐broadened and foreign‐gas (N₂ and O₂) broadened linewidths of O₃ at 300 °K for a wide range of quantum numbers J and K_a, for both type A and type B bands, have been calculated using the Anderson–Tsao–Curnutte theory of line broadening. In the case of O₃–O₃ collisions, dipole–dipole, dipole–quadrupole, quadrupole–dipole, and quadrupole–quadrupole interactions have been included. For O₃–N₂ and O₃–O₂ collisions, dipole–quadrupole and quadrupole–quadrupole interactions were taken into account. Good agreement was obtained between the available measured linewidths and the computed values for corresonding transitions on using the molecular quadrupole moments of O₃ given by Rothenberg and Schaefer. Air‐broadened linewidths of O₃ at 200 °K have also been computed, so that the temperature dependence can be established.