Triplet Pulse Sequences in the Measurement of Long Nuclear Spin Lattice Relaxation Times

Abstract
The use of triplet pulse sequences makes it possible to measure nuclear spin lattice relaxation times in a single scan, an advantage for liquids with long T 1's. One appropriate pulse sequence is discussed, the optimum conditions for obtaining precise T 1 values are outlined, and a technique for obtaining 90° pulses of the necessary accuracy is described.