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Two-Pulse Nutation Echoes Generated by Gradients of the Radiofrequency Amplitude and of the Main Magnetic Field

✍ Scribed by Ioan Ardelean; Attila Scharfenecker; Rainer Kimmich

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 109 KB
Volume: 144
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2000.2017

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✦ Synopsis

A two-pulse NMR nutation spectroscopy scheme is suggested that leads to a new type of spin echoes. The amplitude of the radiofrequency (RF) pulses as well as the external magnetic field are assumed to be subject to gradients G 1 and G 0 , respectively, in the same but otherwise arbitrary direction. Multiple echoes are predicted and observed at times k(G 1 /G 0 ) 1 and ؏ k(G 1 /G 0 ) 1 (k ‫؍‬ 1, 2, 3, . . .) after the second RF pulse, where 1 represents the radiofrequency pulse duration, and is the spacing of the RF pulses. Based on these echoes, a method for diffusion measurements is proposed that simultaneously provides the spin-lattice relaxation time and the self-diffusion coefficient.

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