Abstract

Pressure shift calculations, based on the semiclassical ATC theory and on the quantum Fourier transform (QFT) theory, are compared wtih experimental results for seventy-two inversion, rotation, and vibration transitions of 14NH3 and 15NH3. ATC, even if not exact, allows a far better agreement than QFT. A possible reason for this is briefly discussed.

© 1989 Optical Society of America

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