Circularly polarized RF magnetic fields for spin-1 NQR
Document Type
Article
Publication Date
1-1-2001
Department
Department of Physics
Abstract
The low sensitivity of nuclear quadrupole resonance (NQR) of powders is due, in part, to the inability to efficiently excite and detect nuclei at all crystal orientations. Here we describe the use of circularly polarized RF magnetic fields for excitation followed by detection of the resultant circular RF magnetization in I = 1 NQR to increase the fraction of nuclei excited and detected. We show that the technique can greatly improve the effective RF field homogeneity and increase the largest signal amplitude by a factor of 1.72. In favorable cases, the resulting circularly polarized NQR signal can be separated from linearly polarized magnetoacoustic and piezoelectric ringing artifacts that occur in some NQR materials detection applications.
Publication Title
Journal of Magnetic Resonance
Recommended Citation
Miller, J.,
Suits, B. H.,
&
Garroway, A.
(2001).
Circularly polarized RF magnetic fields for spin-1 NQR.
Journal of Magnetic Resonance,
151(2), 228-234.
http://doi.org/10.1006/jmre.2001.2366
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3981