Chinese Journal of Magnetic Resonance ›› 1993, Vol. 10 ›› Issue (2): 165-170.

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OFF-RESONANCE EFFECT IN 14N REMOTE NQR SPECTROSCOPY

Li Gengying, Jiang Yu, Wu Xuewen   

  1. Analytical Center, East China Normal University, Shanghai 200062
  • Received:1992-08-27 Revised:1992-11-06 Published:1993-06-05 Online:2018-01-20
  • Supported by:
    This work was financially supported by Science and Technology Commission of Shanghai Municipality with "the Morning Star Project for Young Scientists"

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Abstract: Off-resonance effect in 14N remote NQR was studied in detail. It is discovered that the observed 14N remote NQR signal intensity is strongly dependent on the strength of off-resonance and reaches its maximum value when the offset is close to the rf field strength. This dependence of signal intensity upon off-resonance may be used to increase the sensitivity of the 14N remote NQR spectrometer. The result is discussed and explained theoretically by the numerical calculation of pulse excitation bandwidth.

Key words: 14N remote NQR, Off-resonance effect, Excitation bandwidth

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