@article{Br,
	title = {Enhancement of the central-transition signal in static and magic-angle-spinning {NMR} of quadrupolar nuclei by frequency-swept fast amplitude-modulated pulses},
	doi = {10.1016/j.cplett.2003.11.049},
	abstract = {We here report on using fast amplitude-modulated (FAM) pulse trains with constantly incremented pulse durations (SW-FAM) for signal enhancement in one-dimensional nuclear magnetic resonance spectra of quadrupolar nuclei with half-integer spin. In such systems, a FAM pulse train leads to a redistribution of populations across the spin levels, which results in a substantial gain for the central-transition signal. Compared to fixed-duration FAM pulse trains, SW-FAM delivers about the same signal enhancement for spinning samples, but gives much better performance in the static case. This is demonstrated for several compounds, observing the nuclei 23 Na (I ¼ 3=2), 27 Al (I ¼ 5=2), and 45 Sc (I ¼ 7=2).},
	author = {Br, Thomas and Ramaswamy, Kannan and Madhu, P K},
}

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