Low frequency NQR using double contact cross-relaxation

D Stephenson, J A S Smith

Research output: Contribution to journalConference paper

1 Citation (Scopus)


A cross-relaxation technique is described which involves two spin contacts per double resonance cycle. The result is an improvement in signal to noise ratio particularly at low frequencies. Experimental spectra and analyses are presented: N-14 in ammonium sulphate showing that the technique gives essentially the same information as previous studies; N-14 in ammonium dichromate determining e(2)Qq/h as (76+/-3) kHz and eta = 0.84+/-.04; Li-7 in lithium acetylacetonate for which the spectrum (corrected for Zeeman distortion) yields e(2)Qq/h = (152 +/-5) kHz and eta = .5 +/-.2. Calculated spectra are presented to demonstrate the eta dependence of the line shapes for Li-7.
Original languageEnglish
Pages (from-to)37 - 40
Number of pages4
Issue number1-2
Publication statusPublished - Jan 2000
Event15th International Symposium on Nuclear Quadrupole Interactions (XVth NQI 99) - LEIPZIG, Germany
Duration: 1 Jan 2000 → …


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