Now showing items 231-240 of 344
Spin Directions in Pure Chromium
(The American Institute of Physics, 1969-03-01)
We have carried out a triple‐axis polarized‐neutron‐beam experiment with polarization analysis of the final beam and magnetic fields to 15 kG applied to a pure Cr single crystal. The purpose was to determine whether the ...
Reflection of Electrons by Standing Light Waves: A Simple Theoretical Treatment
(The American Institute of Physics, 1967-03-15)
The reflection of electrons by standing light waves, i.e., the stimulated Compton scattering proposed by Kapitza and Dirac, has been treated by applying the Born approximation. The probability that an electron will be ...
Influence of Nonbonded Interactions on Molecular Geometry and Energy: Calculations for Hydrocarbons Based on Urey—Bradley Field
(The American Institute of Physics, 1967-11-15)
A modified Urey—Bradley potential energy function comprised of quadratic terms for bond stretches, bond‐angle bends, and torsional displacements together with analytical expressions for pairwise nonbonded interactions was ...
Electron‐Diffraction Study of Ammonia and Deuteroammonia
(The American Institute of Physics, 1968-09-15)
The gas‐phase structures of NH3 and ND3 molecules were determined by the sector‐microphotometer method of electron diffraction. The following internuclear distances rgrg and mean amplitudes lele with estimated standard ...
Effects of Electron Correlation in X‐Ray and Electron Diffraction. IV. Approximate Treatment for Many‐Electron Atoms
(The American Institute of Physics, 1966-12-15)
A simple scheme is proposed for predicting effects of electron correlation on intra‐atomic electron—electron radial distribution functions and on intensities of x rays scattered by gas atoms. It makes use of a relationship ...
Electron Densities from Gas‐Phase Electron Diffraction Intensities. II. Molecular Hartree–Fock Cross Sections
(The American Institute of Physics, 1969-10-01)
Differential cross sections for electron scattering based on molecular Hartree–Fock electron densities are compared with cross sections based on the independent‐atom approximation for the molecules C2, N2, O2, F2, and CO. ...
Electron‐Diffraction Structural Study of Polymeric Gaseous Hydrogen Fluoride
(The American Institute of Physics, 1969-04-15)
Electron diffraction patterns with molecular interference features extending beyond s = 35Å−1s=35Å−1 were obtained for gaseous self‐associated HF introduced under its own vapor pressure at −19° and at +22°C through a ...
Electron Densities from Gas‐Phase Electron Diffraction Intensities. I. Preliminary Considerations
(The American Institute of Physics, 1969-10-01)
The intensity of electrons and x rays scattered by a freely rotating molecule is determined, in the kinematic approximation, solely by the nuclear–nuclear, electron–nuclear, and electron–electron radial distribution functions ...
Experimental Study of Anomalous Electron Stream Behavior
(The American Institute of Physics, 1961-02)
Experimental measurements on the characteristics of the sole current in a rectilinear crossed‐field beam are reported. The sole current may be assigned a kinetic temperature on the order of 10 v corresponding to energy in ...
A Simple Method for Improving the Accuracy of Cross‐Spectral Density Measurements
(The American Institute of Physics, 1960-09)