New theoretical analysis ofv 2 0→1Q-bands of ammonia

Summary The analysis ofQ-band infra-red transitionsv ₂0→1 of ammonia has been performed by using existing data and a simple polynomial expansion up to the tenth order ofJ andK. The lines withK=3 require an additionalJ-dependent term because of theK-splitting effect. In this manner, the spectrum has been reproduced within the accuracy of the experimental data. New experimental lines withJ≦20 have been reported or assigned. To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.