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The use, in pulsed nuclear resonance experiments, of a voltage-to-frequency converter and an electronic counter to act as an integrator for the observed signals is described. Because measurements of this type are free of most subjective influences, they improve upon continued replication. Data are obtainable in a form which may easily be processed by a digital computer. Increased accuracy and sensitivity are the result. Sample T1 determinations are presented. The relaxation in a sample showing a single T1 is followed to within one part in 104 of equilibrium. Remarks are made concerning the design and use of a calibration equation capable of accounting for the behavior of a vacuum tube diode detector biased for linear operation.
E. O. Stejskal (1963) studied this question.