Abstract
By increasing the pulse rate in WHH-type multiple-pulse sequences we have succeeded in qualitatively improving the resolution in high-resolution proton magnetic resonance (PMR) spectroscopy in solids. WHH-type sequences are characterized by pulse spacings τ and 2τ, and we are now able to operate a 90 MHz multiple-pulse spectrometer with τ = 2 μsec. The gain in resolution is demonstrated by showing multiple-pulse FT spectra of single-crystal spheres of ferrocene and malonic acid. These spectra also demonstrate the substantial enhancement of the signal-to-noise ratio which naturally results from enhanced resolution. Preliminary results obtained at 270 MHz are also reported.
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