Multi-echo in phase-separated He3–4He solid solutions under NMR conditions

Abstract

A pulsed NMR method is used to make the first observation and study of the multi-echo in a phase-separated He3–4He solid solution. Analysis of the behavior of the second echo under these conditions in comparison with the results obtained in samples of liquid and solid He3 reveals the presence of a significant amount of liquid He3 in a fine-grained He3 phase and offers a new explanation of the origin of the unusual damping of the first echo observed previously under these conditions.