title: Rabi resonance in spin systems: theory and experiment.
abstract: The response of a magnetic resonance spin system is predicted and experimentally verified for the particular case of a continuous wave amplitude modulated radiofrequency excitation. The experimental results demonstrate phenomena not previously observed in magnetic resonance systems, including a secondary resonance condition when the amplitude of the excitation equals the modulation frequency. This secondary resonance produces a relatively large steady state magnetisation with Fourier components at harmonics of the modulation frequency. Experiments are in excellent agreement with the theoretical prediction derived from the Bloch equations, which provides a sound theoretical framework for future developments in NMR spectroscopy and imaging.
authors.affiliation: The University of Melbourne, Melbourne, Australia. Electronic address: klayton@unimelb.edu.au.
authors.forename: Kelvin J
authors.initials: KJ
authors.lastname: Layton
authors.affiliation: The University of Melbourne, Melbourne, Australia.
authors.forename: Bahman
authors.initials: B
authors.lastname: Tahayori
authors.affiliation: The University of Melbourne, Melbourne, Australia.
authors.forename: Iven M Y
authors.initials: IM
authors.lastname: Mareels
authors.affiliation: The University of Melbourne, Melbourne, Australia.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Farrell
authors.affiliation: The University of Melbourne, Melbourne, Australia.
authors.forename: Leigh A
authors.initials: LA
authors.lastname: Johnston
keywords: Amplitude modulation; Bloch equations; Continuous wave; NMR; Rabi frequency; Rabi resonance