ZEEMAN TRANSITIONS IN LOW MAGNETIC-FIELD - DEPENDENCE OF LINE-SHAPES ON THE ASYMMETRY PARAMETER FOR SPIN GREATER-THAN-OR-EQUAL-TO-3 2 SYSTEMS/

Transitions between the Zeeman levels of spin 3/2 systems have been de tected in low magnetic fields (ca. 25 mT) via the dynamic solid effect . Transitions are detected at frequencies nu(P) +/- nu(Q), where nu(Q) corresponds to the Zeeman splitting of the +/-1/2 and/or the +/-3/2 l evels in the smalt applied field, and nu(P) is the proton NMR frequenc y. Using this approach, the line shape for polycrystalline samples can be recorded with a good signal-to-noise ratio despite the low frequen cies involved. Computer calculated line shapes are also presented, whi ch show that the asymmetry parameter can be obtained from the experime ntal spectra.