NMR Shift and NMR Linewidth in SuperfluidHe3

Abstract
A set of equations is given, which allows us to rederive both the results of Leggett (hydrodynamic regime) and of Maki and Ebisawa (collisionless regime) for NMR in superfluid He3. The NMR linewidths for both transverse and longitudinal resonance are derived by introducing a relaxation-time approximation. The results are in good agreement with experimental data.