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VOLUME 60 (1994) | ISSUE 6 | PAGE 416
Numerical simulation of two-pulse NMR in superfluid 3He-S
Two-pulse NMR has been simulated numerically in the spatially uniform approximation in the Leggett-Takagi two-fluid model. In the particular configuration considered, the first rf pulse, at the Larmor frequency Q,L, sends the system into the regime of the long-lived Brinkman-Smith mode. The next rf pulse, at the sum or difference frequency Ω^ίΐ^, creates a nonequilibrium state. When a mechanism analogous to the mechanism of catastrophic relaxation operates, this nonequilibrium state may lead to the destruction of the coherent induction signal. © 1994 American Institute of Physics.