Abstract

A new method for nuclear spectroscopy based on population trapping effect is proposed. The atom optical transitions are supposed to be excited by the resonance bichromatic laser field in the case of two levels of hyperfine structure (Λ-type transition). In this case the population rates for hyperfine levels as a function of laser and atom parameters are calculated. The conditions necessary for the existence of population rate differences for two hyperfine levels are obtained. Due to this difference a nuclear polarization (orientation) may arise that can be measured by the observation of angular distribution of nuclear decay products. The nuclear polarization arises in the case of a plane polarized bichromatic laser field.

© 1994 IEEE