## Abstract Composite pulses that compensate for resonance offset and electric field gradient inhomogeneity are proposed for broadband excitation of pure nuclear quadrupole resonance systems in powders. The excitation band width of the composite pulse sequences was obtained with a numerical calcula
Composite pulse excitation for spin-1 pure nuclear quadrupole resonance spectroscopy in powders
β Scribed by Geng-Ying Li; Yu Jiang; Xue-Wen Wu
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 415 KB
- Volume
- 202
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Composite pulses designed to compensate the inhomogeneity of the radio-frequency field using numerical calculation procedures in spin-l NQR in powders are presented. It is demonstrated by computer simulation and experimental result that the perforrnanceofthe proposed composite pulses, ( ),( 1gO)90 and ( )o(54),7,( ),( )9~( )ls~( )~( )o(54)~, is much better with respect to the compensating rftield inhomogeneity than that of conventional single pulses.
π SIMILAR VOLUMES
A fundamental problem in Fourier transform NMR spectroscopy is the calculation of observed resonance amplitudes for a repetitively pulsed sample, as first analyzed by Ernst and Anderson in 1966. Applications include determination of spin-lattice relaxation times (T 1 's) by progressive saturation an