Publication
Physical Review Letters
Paper
Precision determination of CH3F dipole moment by nonlinear infrared spectroscopy
Abstract
An optical double-resonance effect, requiring two optical frequencies, is demonstrated in the infrared for the molecule CH3F, and provides high-precision dipole-moment values for both the ground and an excited vibrational state. The method is a particularly convenient and precise means for probing optically excited molecular levels. © 1970 The American Physical Society.