Q-BRANCH LINE MIXING EFFECTS IN THE (20(0)0)(I)[-01(1)0 AND (12(2)0)(I)[-01(1)0 BANDS OF CARBON-DIOXIDE PERTURBED BY N-2, O-2, AND AR AND IN THE 13(1)0[-00(0)0 AND 13(1)0[-01(1)0 BANDS OF PURE NITROUS-OXIDE

Line-mixing effects have been studied in two Q branches of the absorpt ion spectra of CO2, in mixtures with nitrogen, oxygen, and argon. The corresponding transitions are (20(0)0)(I) <-- 01(1)0 and (12(2)O)(l) < -- 01(1)0, centered near 2130 cm(-1) and 2093 cm(-1), respectively. Li ne-mixing effects have also been examined in two Q-branches of pure N2 O, corresponding to the 13(1)0 <-- 00(0)0 and 13(1)0 <-- 01(1)0 transi tions, centered near 3046 cm(-1) and 2457 cm(-1), respectively. Good a greement is obtained between the experimental results and computations taking line mixing effects into account with a phenomenological model for the relaxation matrix. (C) 1996 Academic Press, Inc.