A THEORETICAL-STUDY ON EFFECTS OF ELECTRON-SPIN RELAXATION IN PULSED NUTATION EXPERIMENTS FOR A QUARTET STATE IN LIQUID SOLUTION

An effect of spin relaxation on electron spin nutation was analyzed th eoretically for a quartet state in liquid solution. Modulation of zero -field interactions by random rotational motion is considered as a sou rce of electron spin relaxation under an assumption of a short correla tion time. We solved the quantum mechanical equation of motion under a nutation pulse and calculated a nutation spectrum. The results showed that the nutation frequency was strongly affected by spin relaxation. We discuss dependencies of several parameters, such as a rotational c orrelation time, a microwave field intensity and frequency, and a zero -field interaction on nutation frequency.