Physical Review LettersOff-Resonant Light as a Probe of Optically Pumped Alkali VaporsW. Happer, B.S. MathurPublished Apr 10, 1967• 72 citationsPublisherAbstractReceived 5 December 1966DOI:https://doi.org/10.1103/PhysRevLett.18.577©1967 American Physical SocietyDOI10.1103/physrevlett.18.577