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- W1972499766 abstract "Using the theory developed in Part I of this series (1) we determine the optimum pulse spacings using saturation recovery, inversion recovery, fast inversion recovery, and Freeman-Hill techniques for the measurement of spin-lattice relaxation times, T1, for conditions of ideal 90° and 180° pulses. We also compare the performance of these techniques, using as the criterion the total experimental time required to reach a specified precision in the estimate of T1. The important assumptions made are (1) that an interval of uncertainty is known for the value of T1, i.e., that the experimenter has a priori knowledge of an interval (TA, TB) in which T1 lies, and (2) that both the equilibrium magnetization M(∞) and T1 are unknown. For the conditions that we consider we find that fast inversion recovery is the most efficient technique in obtaining a fixed precision in the estimate of T1. For any interval of uncertainty the waiting time W = 2 TB proves to be optimal or near optimal. For the ideal 90° and 180° pulse situation, we find that over a wide range of uncertainty intervals the inversion recovery technique is always quicker than saturation recovery in obtaining a fixed precision in the estimate of T1. Analyses that make preliminary estimates of the equilibrium magnetization are found to be slower than those that determine T1 and M(∞) simultaneously from a set of data." @default.
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- W1972499766 date "1980-02-01" @default.
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- W1972499766 title "The choice of optimal parameters for measurement of spin-lattice relaxation times. II. Comparison of saturation recovery, inversion recovery, and fast inversion recovery experiments" @default.
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- W1972499766 doi "https://doi.org/10.1016/0022-2364(80)90045-1" @default.
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