Pulsed spin-locking of spin-3/2 nuclei: 39K-NQR of potassium chlorate.

Kyle Edward Nixon, Karen L Sauer

Journal of magnetic resonance (San Diego, Calif. : 1997) 2022 Feb

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A model was developed for predicting a locked signal under a series of refocusing pulses for Nuclear Quadrupole Resonance (NQR) of spin I=32 and tested with a powder of KClO3. This work represents the first direct NQR detection of the 39K line of potassium chlorate. The characteristic time constants, T1,T2e and T2∗, were measured to determine the detectability of potassium chlorate via 39K-NQR. The echo train T2e was found to be strongly dependent on the refocusing pulse-spacing and weakly dependent on the refocusing pulse strength. The optimal angles of the excitation and echo pulse for a pulse train were also determined, as well as, the resonance-frequency dependence on sample temperature. Copyright © 2022 Elsevier Inc. All rights reserved.

Citation

Kyle Edward Nixon, Karen L Sauer. Pulsed spin-locking of spin-3/2 nuclei: 39K-NQR of potassium chlorate. Journal of magnetic resonance (San Diego, Calif. : 1997). 2022 Feb;335:107145