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

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 KClO . This work represents the first direct NQR detection of the K line of potassium chlorate. The characteristic time constants,...

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Bibliographic Details
Published inJournal of magnetic resonance (1997) Vol. 335; p. 107145
Main Authors Nixon, Kyle Edward, Sauer, Karen L
Format Journal Article
LanguageEnglish
Published United States 01.02.2022
Subjects
Spin-3/2
Spin-echo decay
Zero-field NMR
Pulse sequences
Potassium chlorate
Nuclear quadrupole resonance
Spin-lattice relaxation time
Quadrupolar nuclei
Half-integer quadrupoles
Powder sample
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Summary: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 KClO . This work represents the first direct NQR detection of the K line of potassium chlorate. The characteristic time constants, T ,T and T , were measured to determine the detectability of potassium chlorate via K-NQR. The echo train T 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.
ISSN:1096-0856