Double-Peaked Longitudinal and Transverse NMR Spectra in SuperfluidHe3−A

Abstract

New NMR resonances in bulk ${}_{}{}^3{}_{}{}^{}\mathrm{He}-A$ have been investigated. These appear in both longitudinal and transverse modes as small satellites on the low-frequency sides of the already-well-studied resonances predicted by theory. We find that the satellite frequencies in the two modes have slightly different temperature dependences. We also find that the satellites are enhanced by rapid temperature changes and are suppressed in a confined geometry.