Abstract
Abstract 87 Rb and 39 K nuclear magnetic resonance (NMR) spectra of RbKSO 4 single crystals were measured at room temperature. 87 Rb central line has the angular dependences of second-order quadrupolar shifts. From these results, the quadrupole coupling constant and the asymmetry parameter were determined at room temperature. In addition, the spin–lattice relaxation rate, 1/ T 1 , and the spin–spin relaxation rate, 1/ T 2 , were measured as a function of temperature. The values of 1/ T 1 for the 87 Rb and 39 K nuclei were found to increase with increasing temperature, and 1/ T 1 was determined to be proportional to T n . Therefore, for the 87 Rb and 39 K nuclei, Raman processes with n =2 are more significantly in nuclear quadrupole relaxation than direct processes.
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