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Showing 1 to 10 of 10 for “"Motional Narrowing"”.
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Raman Scattering Study of Interactions of Cyanide Impurities in Potassium-Chloride Under Variation of Temperature and Concentration (near-Neighbor Pairing, Davydov Splitting, Motional Narrowing)
… The low temperature width and observed motional narrowing of the primary peak assigned to isolated cyanide impurities is attributed to interaction with non-near-neighbor defects in the lattice. A splitting has been observed in a spectral feature attributed to CN('-) pairs and attributed …
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Design and demonstration of a motional narrowing method to measure a low temperature 3He diffusion coefficient for a superfluid neutron electric dipole moment experiment
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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An NMR study of diffusion of CO on metal surfaces
… for the low temperature phase as is evidenced by motional narrowing of the NMR line. At a given temperature, the diffusion rate in this phase is faster on larger clusters. Using the S-shape method to study diffusion of CO on Pt, the author has found that the barrier for diffusion is larger for …
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Deuterium Solid State NMR Studies of Pyridine Intercalation Compounds
… pattern lineshapes above 333K show signs of motional narrowing. A short spin-lattice relaxation (T$\sb1$) component, attributed to the motionally narrowed lineshape component, showed a sharp decrease corresponding with their appearance in the lineshape. The narrowing motion was found to be …
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Structure and motion of charge density waves, and NMR study of NbSe3
… NMR studies at 77 K include the observation of motional narrowing and the saturation of the magnetization, with applied voltages above the conduction threshold, and measurements of the COW displacement, at smaller applied voltages. The motional narrowing and saturation results demonstrate that …
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Analytische Näherungsverfahren zur Beschreibung der nuklearen Spin-Dephasierung
… Dynamikbereichen der Störfeldfluktuationen (motional narrowing - , static dephasing limit) gültig sind. In dieser Arbeit zeigen wir einen Ansatz, mit dem man die Dynamik der Störfeldfluktuationen erheblich vereinfachen und trotzdem noch deren wesentliche Eigenschaften beibehalten kann. Dieser …
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Nuclear magnetic resonance study of the bonding of carbon monoxide to palladium and platinum surfaces
… the existence of a Knight shift. From the motional narrowing of the NMR line a diffusion energy of 6+2 kcal/mol for CO on the Pd surface is deduced. A C-0 boo:i length of 1.20+.03 A for CO chemisorbed on Pd was measured using a spin echo double resonance (SEOOR) experiment observing the 170 …
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Magnetic resonance microscopy
… A scaling law was used to predict the onset of motional narrowing effects for given values of diffusion, length, gradient strength, and gyromagnetic ratio. Barriers to translational diffusion were found to result in significant edge effects. Such edge effects were also predicted for …
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Electrochemical and NMR Studies of Fuel Cell Catalysts and Carbon Monoxide Surface Diffusion
… The CO adsorbed on Ru was metallic and the motional narrowing of the spectrum, and the deviation from Korringa behavior, all indicate the occurrence of the CO surface diffusion. Fermi level local density of states for CO 5sigma and 2pi* shows that the CO adsorption bond is weaker on Ru than …
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Spin dynamics of bulk and quasi-two-dimensional metal halide based perovskite semiconductors
… interactions outcompete the precessional motional narrowing spin relaxation that was previously reported for lower carrier densities. Therefore, we observe that room temperature spin lifetimes are largest, ~3.2 ps, at an operating carrier density of ~10<sup>15</sup> cm<sup>-3</sup>. We …