He-plated MCM-41: NMR Studies*

We utilize pulsed NMR techniques to study the dynamics of ³He atoms in quasi-1D. The quasi-1D structure was formed within the nanochannels of mesoporous MCM-41 plated with a monolayer of ⁴He. Measurements were carried out between 0.030K < T < 3.0K, with a ³He line density of 0.1Å^-1. Direct measurement of the nuclear spin magnetization as a function of temperature show the effect of degeneracy more pronounced in a quasi-1D system compared to 3D systems. Studies of the nuclear spin-lattice interaction show a characteristic peak at 2T_F, while the nuclear spin-spin interaction show unusual temperature dependencies below 0.5K.