Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5406475 | Journal of Magnetic Resonance | 2009 | 6 Pages |
Abstract
The use of high-Q probes to increase the sensitivity in NMR and NQR is a well-known technique, however very high Q values are associated with several limitations. This paper explores the 14N NQR multipulse detection of trinitrotoluene (TNT) signal-to-noise ratio as a function of the pickup coil Q factor, with a particular emphasis on the “super-Q” regime, where probe bandwidth becomes narrower than the NQR linewidths. We have used a mixed experimental-theoretical approach to find the TNT Q-dependent signal-to-noise value which avoided the inconvenient construction of a probe at every Q. The process has been repeated for a range of excitation/detection frequencies and a 2D sensitivity map was obtained. Our analysis suggests, that sensitivity is maximum and practically Q-independent when 400
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Alan GregoroviÄ, Tomaž Apih,