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Full-Text Articles in Physics
Non-Rayleigh Signal Statistics Caused By Relative Motion During Measurements, A. R. Jameson, Alexander Kostinski
Non-Rayleigh Signal Statistics Caused By Relative Motion During Measurements, A. R. Jameson, Alexander Kostinski
Department of Physics Publications
In order to reduce fluctuations, remote sensing devices such as radars and radiometers typically sample many times before forming an estimate. When mean values are stationary during this sampling period, the fluctuations in the amplitudes and intensities obey the same probability density functions (pdf) as those for each sample contributing to the estimate. However, it is shown in this work that when mean values change from sample to sample (i.e., pulse to pulse for most radars), the pdf's of the amplitudes and intensities differ from those corresponding to the samples. Such changes can be inherent to the scatterers as, for …
Simulation Of Slow Variable-Angle Spinning Nmr Spectra. Application To 13c Bonded To N, B H. Suits, J. Sepa, David Wnite
Simulation Of Slow Variable-Angle Spinning Nmr Spectra. Application To 13c Bonded To N, B H. Suits, J. Sepa, David Wnite
Michigan Tech Publications
Simulations of NMR spectra for spin-j nuclei in rigid solids spun at relatively slow speeds and at angles other than the magic angle are presented. Particular emphasis is on the case where I3C is bonded to a quadrupolar nucleus such as 14N. The feasibility of quantitatively extracting the chemical-shift tensor, bond lengths through the dipolar interaction, and the electric-field gradient of the neighboring nucleus from a single (1-D) spectrum is demonstrated. The sensitivity of the observed changes in the spectra to changes in the physical and experimental parameters is discussed and illustrated using nitrile I3C spectra of solid CH3CN. Equations …