Acoustic saturation of nuclear magnetic resonance lines

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Study has been made of the effect of acoustic power applied at twice the Larmor frequency on the individual nuclear magnetic resonance lines in the presence of radio-frequency power. When\(W''_{u2} (W_{u\tfrac{1}{2} \to - \tfrac{3}{2}} )\) is finite and other ultrasonic transition probabilities are zero, one obtains the same acoustic saturation behaviour for the central resonance line for the quadrupolar and the magnetic relaxations. For an arbitrary spinI, this expression has been generalized. However, the central resonance line remains unaffected when ultrasonic transition probabilities other than\(W''_{u2} \) are finite separately. The effect of the acoustic power on the satellites for different cases is studied in great detail. Some of the satellites are affected and a few are unaffected. Some of the affected satellites show interesting behaviour in the sense that, instead of the regular saturation behaviour, enhancement effect and negative ratios of the population difference to its equilibrium value are obtained for higher values ofU which is a measure of acoustic power.