Abstract
The mutual effects of radiation damping and relaxation in two-dimensional correlation (COSY) experiments are discussed. Multiple-quantum (MQ)-like artifacts in 2D COSY experiments using Q-switch are simulated under three different conditions: (i) no damping during t 1 but radiation damping during t 2; (ii) relaxation damping during t 1 and radiation damping during t 2; (iii) relaxation damping and weak radiation damping during both t 1 and t 2. It is shown that when radiation damping effects during t 1 are reduced by switching Q to low but are strong during t 2 by switching Q to high, MQ-like artifacts can be expected. However, relaxation effects during t 1 can strongly influence the lineshape of the artifacts.
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