A NEW MULTIPLE PI-PULSE SEQUENCE IN SOLID-STATE NMR

A new phase cycling scheme is proposed for use in solid-state NMR expe riments involving multiple pi-pulses. The phase of the sequence follow s the supercycled concept proposed a decade ago for heteronuclear deco upling experiments. Both theoretical and experimental results suggest that the concept of supercycling can be used in experiments other than decoupling schemes, and may be of particular utility in novel solid-s tate NMR experiments for reintroduction of the dipolar interaction dur ing magic angle spinning.