Radio-frequency pulse apparatus is described for nuclear magnetic and pure quadrupole spin-echo and free induction decay experiments in the 15 to 42 Mc frequency range. Nuclear spin relaxation times between 20 μsec and 50 sec have been measured with the apparatus. Simple cryostats provide temperatures from 100° to 500°K.
Intense radiofrequency power in the form of pulses is applied to an ensemble of spins in a liquid placed in a large static magnetic field ${H}_{0}$. The frequency of the pulsed ...
By utilizing the method of pulsed nuclear magnetic resonance, radio-frequency energy in the form of pulses can be stored serially in a sample of nuclear spins and recalled at an...
A derivation is given of the effect of a time-dependent magnetic field gradient on the spin-echo experiment, particularly in the presence of spin diffusion. There are several re...
Nuclear resonance techniques involving free precession are examined, and, in particular, a convenient variation of Hahn's spin-echo method is described. This variation employs a...
The phenomenological Bloch equations in nuclear magnetic resonance are generalized by the addition of terms due to the transfer of magnetization by diffusion. The revised equati...
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