抄録
13C and 1H relaxations of 13C-enriched chloroform dissolved in the smectic A phase of S2 are measured at 90, MHz for 1H. From various experiments for the coupled spinsystem together with 1H-data for the same mol\with natural abundance of 13C, we have separated spectral densities on reorientation of a molecular axis of the chloroform. They are markedly different from those expected from the purely rotational dynamics; namely, only the component for fluctuation of a dipolar field in the direction of the magnetic field, which has a nonzero average in the ordered state, have been fairly large and frequency-dependent. This result is presumably due to the coupling of translational and rotational motions of the solute deeply inherent in the smectic phase.
