Abstract
Abstract A new method for optical detection of electron spin resonance ESR for both ground and relaxed excited states of F center has been tested for KBr, KI and RbCl using microwave at 49.8 GHz via detecting the microwave-induced change in magnetic circular polarization of F center emission. The g-values and half-widths are tabulated. The dependence of ESR signal intensities for KBr on microwave power, laser power, and pumping photon energy are measured and explained in terms of forms derived from the solutions of rate equations for optical pumping cycle proposed.
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