Topic
Nuclear quadrupole resonance
About: Nuclear quadrupole resonance is a research topic. Over the lifetime, 3531 publications have been published within this topic receiving 38801 citations. The topic is also known as: Nuclear quadrupole resonance spectroscopy & NQR.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, Cone et al. used spectral hole burning and optical detection of nuclear quadrupole resonance to examine at much higher precision the degree to which the defect spectra associated with the various crystal growths are identical.
Abstract: Earlier work [Cone {ital et al.}, J. Phys. C {bold 17}, 3101 (1984); Cone {ital et al.}, J. Phys.: Condens. Matter {bold 5}, 573 (1993)] on EuVO{sub 4} has described the fluorescence excitation spectra associated with the large number of defect sites ({gt}50) previously discovered in this material. To establish which if any of the defect sites were intrinsic to the EuVO{sub 4} crystal structure rather than being dependent on particular growth procedures, EuVO{sub 4} crystals were prepared from fluxes with different compositions. The present work extends this study, using the techniques of spectral hole burning and optical detection of nuclear quadrupole resonance to examine at much higher precision the degree to which the defect spectra associated with the various crystal growths are identical, and to attempt a preliminary correlation of such spectra with the methods of crystal growth. We discuss the relative importance of the lattice and electronic contributions to the ground-state quadrupole interactions and conclude that the electronic contribution is almost always larger than the lattice contribution. The data also allow conclusions to be drawn regarding the relative importance of {ital pseudoquadrupolar} effects in the spectra and they are found to be small. This work forms a basismore » for detailed study of particular defect sites to be discussed in further papers. {copyright} {ital 1997} {ital The American Physical Society}« less
13 citations
TL;DR: In this article, the temperature dependences of the 14N nuclear quadrupole resonance frequencies have been measured in phases II, III, IV and V of ammonium nitrate with the help of the 1H−14H NQ double resonance technique.
Abstract: The temperature dependences of the14N nuclear quadrupole resonance frequencies have been measured in phases II, III, IV and V of ammonium nitrate with the help of the1H−14H nuclear quadrupole double resonance technique. The experimental results are related to the proposed crystal structures and disorder in the various crystallographic phases.
13 citations
13 citations
Patent•
28 Jan 2011TL;DR: In this article, the stimulated response due to nuclear quadrupole resonance can be detected using a single monopole, with multiple monopoles improving substance detection, rather than using balanced transmission lines.
Abstract: Rather than using balanced transmission lines the stimulated response due to nuclear quadrupole resonance can be detected using a single monopole, with multiple monopoles improving substance detection.
13 citations
13 citations