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You searched on: Author: eric shirley

Displaying records 141 to 150 of 151 records.
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141. Far-Infrared Two-Phonon Absorption in GaP and GaAs
Published: Date unknown
Authors: Simon Grant Kaplan, H M Lawler, Eric L Shirley, S Bhat, M E Thomas
Abstract: We present detailed temperature dependent absorption spectra of GaP and GaAs at wavenumbers from 20 cm-1 to 350 cm-1 and temperatures between 10 K and 295 K. Comparison of the experimental data with the predictions of recent ab initio anharmonic lat ...

142. Final-State Rule vs. the Bethe-Salpeter Equation for Deep-Core X-ray Absorption Spectra
Published: Date unknown
Authors: J J Rehr, J A Soininen, Eric L Shirley
Abstract: The independent-electron approximation together with the final-state rule provides a well established method for calculating x-ray absorption spectra that takes into account both core-hole effects and inelastic losses. Recently a Bethe-Salpeter Equa ...

143. Local Screening of a Core Hole: a Real-Space Approach Applied to Hafnium Oxide
Published: Date unknown
Author: Eric L Shirley
Abstract: An approach to screening a core hole s potential in solids for purposes such as theoretical near-edge spectrum calculations is developed. In this approach, the core hole s unscreened potential is decomposed into a short-range part and long-range par ...

144. Minizing Spatial-Dispersion-Induced Birefringence in Crystals Used for Precision Optics by Using Mixed Crystals of Materials With the Opposite Sign of the Birefringence
Published: Date unknown
Authors: John H. Burnett, Zachary H Levine, Eric L Shirley
Abstract: We recently measured and calculated an intrinsic birefringence in CaF^d2^ and BaF^d2^ cubic crystals in the ultraviolet (UV). These results present serious problems for use fo these crystalline materials for precision optics in the UV, e.g., for UV ...

145. Modeling Core-Hole Screening in Core-Excitation Spectroscopies
Published: Date unknown
Authors: Eric L Shirley, J A Soininen, J J Rehr
Abstract: We consider screening of the core-hole potential experienced by the ejected electron in core-excitation processes. This potential affects near-edge structure strongly, but it appears difficult to consistently obtain reliable screened core-hole poten ...

146. Multi-Pole Representation of the Dielectric Matrix
Published: Date unknown
Authors: J A Soininen, J J Rehr, Eric L Shirley
Abstract: A good approximation for the electron self-energy or the electron quasiparticle properties is needed for an accurate calculation of x-ray absorption spectra. The GW approximation (GWA) has been found to be relatively reliable in predicting the quasi ...

147. Multiphonon Processes and Infrared Dielectric Response
Published: Date unknown
Authors: H M Lawler, Eric L Shirley

148. NIST Diffraction Program for Diffraction Corrections in Radiometry
Published: Date unknown
Authors: Eric L Shirley, Raju Vsnu Datla
Abstract: This package contains the documentation for a program that computes diffraction corrections for simple radiometric applications. A diskette containing the program executable and files for sample calculations is also included.

149. Soft X-Ray Fluorescence Studies of Solids
Published: Date unknown
Authors: J A Carlisle, Steven R Blankenship, R N Smith, Eric L Shirley, L J Terminello, J J Jia, T A Callcott, D L Ederer
Abstract: Resonant inelastic x-ray scattering (RIXS) has been observed in many systems above and below their core threshold. Below threshold, inelastic-loss features are observed, which disperse linearly with excitation energy, but as the excitation increases ...

150. Straight-edge Diffraction of Planck Radiation
Published: Date unknown
Authors: Peter J Mohr, Eric L Shirley
Abstract: The irradiance diffraction profile of a straight edge is given as a Taylor series in powers of the distance from the geometrical shadow boundary to any point in the profile for monochromatic radiation. The coefficients of the series, which are obtain ...

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