NMR Relaxation Time Study of High Density ³He Monolayer Adsorbed on Grafoil

Abstract

The nuclear spin relaxation times, T₁ and T₂, of ³He in high density ³He monolayer adsorbed on Grafoil were measured by means of pulsed NMR technique at temperatures between 1.2 and 4.2 K. The experimental results are interpreted in terms of the two dimensional motion of atoms and vacancies. The coverage dependence of the formation energy of a vacancy is determined.