Mechanically detected nuclear magnetic resonance at room temperature and normal pressure.
Mech. detected magnetic resonance (MMR) is a new technique for detecting electron or nuclear spin signals. All preceding expts. have been carried out in a <10-3 Torr vacuum at room temp. or at low temps. down to 6 K. In this article the first MMR expts. at normal pressure and room temp. are presented. The mech. detected NMR signals resulted from ammonium nitrate and ammonium sulfate. In addn., techniques for detg. T1 and T1r with mech. expts. were developed. If T1r is not more than two or three times smaller than T1, an inversion-recovery technique, first used for the detection of 19F spins at low temps., can be used. It could be shown that this technique also works in principle at room temp.
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