TwoQuantum Transitions in the Microwave Magnetic Resonance Spectrum of Atomic Chlorine
Abstract
Twoquantum microwave magnetic resonance transitions corresponding to ∆M_{J}=+/2 have been observed for both stable isotopes of atomic chlorine, Cl^{35} and Cl^{37}. The experimentally observed and theoretically predicted positions of the twoquantum transitions agree within 13 parts per million, which was the precision of the experiment. The power dependence of the twoquantum transitions has been measured and checked with a "variation of constants" treatment of the microwaveinduced probability amplitudes, and agreement has been found. Variations in intensity between corresponding ∆M_{J}=+/1 and ∆M_{J}=+/2 resonances were observed and analyzed on the basis of timedependent perturbation theory and the SchwingerKarplus expression for the line shape of a collisionbroadened resonance with saturation. Satisfactory agreement with theory is found for these intensity variations. The linewidths for the ∆M_{J}=+/2 lines are approximately half of that for the ∆M_{J}=+/1 lines; this is in agreement with the results of timedependent perturbation theory.
 Publication:

Physical Review
 Pub Date:
 August 1962
 DOI:
 10.1103/PhysRev.127.805
 Bibcode:
 1962PhRv..127..805W