1949•Proceedings of the Physical Society Section AOpen access

A Direct Method of Measuring Nuclear Spin-Lattice Relaxation Times

L. E. Drain

Abstract

This direct method of measuring nuclear spin-lattice relaxation times is based on Bloch's nuclear induction experiment in which the material investigated is subjected to a magnetic field that is varied several times per second through the value for nuclear resonance. Under certain conditions a simple calculation may be made of the relation between the magnitude of the nuclear induction effect, the relaxation time, and the time intervals between successive passages through resonance. Experimental observation of this relation then determines the relaxation time directly.

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Key concepts: Free induction decay, Spin–lattice relaxation, Relaxation (psychology), Condensed matter physics, Spin–spin relaxation, Nuclear magnetic resonance, Physics, Lattice (music)