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'Scattering cross section' in keywords Facet   Publication Year 1993  [X]
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1993[X]
1Author    Wolfgang Schütz, Beate Waldeck, Dietmar Flösch, Wolf WeyrichRequires cookie*
 Title    Compton Scattering Experiments with Polychromatic Radiation  
 Abstract    We show an iterative algorithm that allows to obtain accurate Compton profiles J(q) from Compton scattering spectra / 2 (o> 2), if the excitation radiation is not strictly monochromatic. It requires knowledge of the spectral distribution of the primary radiation (coj, validity of the impulse approximation and dominance of a monochromatic part in (CD 1) over the polychromatic rest. Conversely, the primary spectrum is often experimentally not directly accessible. In such a situation it is possible to evaluate the primary spectrum ^(coj from the spectrum of scattered photons, / 2 (a> 2), w ith a similar iterative algorithm. We use a scattering target of high atomic number in order to ensure that the elastically scattered photons dominate the inelastically scattered ones. From the scattered spectrum we get a model for the Compton profile that allows us to separate the inelastic part of the scattered spectrum from the elastic part, which, in turn, is proportional to the spectral distribution of the primary radiation. 
  Reference    Z. Naturforsch. 48a, 352—357 (1993); reveived 
  Published    1993 
  Keywords    Compton spectroscopy, Polychromaticity, Scattering cross-section 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0352.pdf 
 Identifier    ZNA-1993-48a-0352 
 Volume    48 
2Author    C. TavardRequires cookie*
 Title    Double-Ionisation Processes and Electronic Structures  
 Abstract    The electron momentum distribution of a given target can be extracted, under impulsive condi-tions, from the simple ionisation processes relevant to Compton collisions. This document classifies and investigates the physical mechanisms of double ionisation, in connection with the target elec-tronic structure. 
  Reference    Z. Naturforsch. 48a, 251—254 (1993); received October 17 1991 
  Published    1993 
  Keywords    Double-ionisation processes, Scattering cross-section, Electron scattering, inelastic, Electronic structure 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0251.pdf 
 Identifier    ZNA-1993-48a-0251 
 Volume    48 
3Author    B. Joulakian, C. DalRequires cookie*
 Title    The Effect of Correlation on the Double Ionization of Helium by Fast Electrons  
 Abstract    The double ionization of helium by fast electrons is studied by using a correlated double con-tinuum wave function describing the two ejected electrons. 
  Reference    Z. Naturforsch. 48a, 255—256 (1993); received October 17 1991 
  Published    1993 
  Keywords    Double-ionisation processes, Scattering cross-section, Electron scattering, inelastic, Electron correlation 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0255.pdf 
 Identifier    ZNA-1993-48a-0255 
 Volume    48 
4Author    StephenW. LoveseyRequires cookie*
 Title    Theories of Compton Scattering by Magnetic Materials  
 Abstract    Theoretical work on the cross-section for Compton scattering by magnetic materials is surveyed. Exact results for scattering by a free polarized electron are contrasted with corresponding results obtained perturbatively for a model of bound electrons with a finite width to the momentum distribution. 
  Reference    Z. Naturforsch. 48a, 261—265 (1993); received December 14 1991 
  Published    1993 
  Keywords    Compton scattering, Scattering cross-section, Magnetic materials, Spin density in momentum space 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0261.pdf 
 Identifier    ZNA-1993-48a-0261 
 Volume    48