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- W2017707623 abstract "An electric field-nuclear-magnetic-double-resonance experiment is described which enables the resolution of certain weak resonances otherwise concealed under a nearby, much stronger resonance. In ${mathrm{Ag}}^{+}$-doped NaCl, the weak resonance of the nearest-neighbor sodium nuclei to the ${mathrm{Ag}}^{+}$ impurity is concealed by the strong resonance of the sodium nuclei far from the impurity due to the small quadrupole splitting of the nearest neighbors. The technique is based on the fact that the ${mathrm{Ag}}^{+}$ ion breaks the inversion symmetry of the near neighbors, whereas the distant nuclei remain at sites of inversion symmetry. As a result an external oscillating electric field can induce $ensuremath{Delta}m=ifmmodepmelsetextpmfi{}2$ transitions in the near neighbors but not in the distant ones. The absorption is detected by monitoring the saturation of the magnetic resonance of the distant nuclei as a function of electric field frequency. The nearest-neighbor sodium nuclei were found to have a static quadrupole coupling constant ${ensuremath{nu}}_{Q}=12.5ifmmodepmelsetextpmfi{}0.2$ kHz with an asymmetry parameter of $ensuremath{eta}=0.28ifmmodepmelsetextpmfi{}0.04$. A simple theory is developed which explains the intensities of the quadrupole lines as a function of the orientation of the electric and magnetic fields. A dynamic quadrupole coupling constant ${ensuremath{nu}}_{D}$ is defined. For the nearest-neighbor sodium nuclei ${ensuremath{nu}}_{D}ensuremath{sim}3ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}2}$ Hz/(V/cm) and for the next-nearest-neighbor sodium nuclei ${ensuremath{nu}}_{D}ensuremath{sim}3ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}4}$ Hz/(V/cm)." @default.
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- W2017707623 date "1973-09-01" @default.
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- W2017707623 title "Electric Field Nuclear Double Resonance in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Ag</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-Doped NaCl" @default.
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- W2017707623 doi "https://doi.org/10.1103/physrevb.8.1924" @default.
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