| Abstract: | The influence of a second radio-frequency-field on the free induction decay is investigated theoretically for an AX-System with intramolecular dipol-dipol-interaction as relaxation mechanism. When the second rf-field is irradiated only during the detection of the free induction signal the Fourier-transformation of this signal yields spin-decoupled-or spin-tickling-spectra without the influence of Overhauser-effects. In the other case when the second rf-field is shut off just before the short π/2-pulse is applied the Fourier Transform of the free precession signal consists of lines at the single-resonance positions, the intensities of which are changed through the generalized Overhauser-effect. The line intensity changes are different whether a selective or a nonselective pulse is applied. |
