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1Author    YuA. Babanov, A. F. Sidorenko, V. R. Shvetsov, M. Bionducci, G. Licheri, G. Navarra, A. L. Ageev, V. V. VasinRequires cookie*
 Title    Combination of EXAFS and Differential Anomalous X-ray Scattering for Studying Ni 2 Zr Amorphous Alloy  
 Abstract    In this paper we report a first application of the new idea of combining EXAFS and differential anomalous scattering techniques to obtain partial distribution functions for a binary amorphous sample. This method has been successfully employed in extracting Ni-Ni and Ni-Zr pair distribu-tion functions for Ni 2 Zr prepared by mechanical alloying. A comparison with results from previous studies is also reported. 
  Reference    Z. Naturforsch. 47a, 1191—1196 (1992) 
  Published    1992 
  Keywords    Metallic glasses, Synchrotron radiation, Partial pair distribution functions 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-1191.pdf 
 Identifier    ZNA-1992-47a-1191 
 Volume    47 
2Author    F. Bell, Th Tschentscher, J. R. Schneider, A. J. RollasonRequires cookie*
 Title    Electron Momentum Densities by (y, e y)-Spectroscopy  
 Abstract    We report coincidence measurements of inelastically scattered 148 keV photons and the recoil electrons generated within thin Al and Cu foils. We have analyzed both the Doppler broadening of the scattered photon intensity and the angular correlation of the recoil electron. This corresponds to different scans through the three-dimensional electron momentum density of the target. Estimates of the triple-differential cross-section for Compton scattering are given. The experiment was per-formed with synchrotron radiation from a bending magnet of the DORIS storage ring at DESY, Hamburg. 
  Reference    Z. Naturforsch. 48a, 273—278 (1993); received October 8 1991 
  Published    1993 
  Keywords    Electron momentum densities, Compton scattering, Synchrotron radiation 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0273.pdf 
 Identifier    ZNA-1993-48a-0273 
 Volume    48 
3Author    A. Petcov, A. Kirfel, K. Fischer, Fr KristallographieRequires cookie*
 Abstract    e n s o ria l R e p r e s e n ta tio n o f / ' f o r N b in L ith iu m -n io b a te , L i N b 0 3 Using Synchrotron radiation, the dependence of resonant phenomena (absorption, fluorescence and Raman scattering) on the angle between the polarisation plane of the incident radiation and the polar c-axis in ferroelectric Lithium-niobate, LiNb03, was studied in the vicinity of the Nb K-absorption edge. Applying the "optical theorem", the observed dipolar anisotropics can be explained in terms of the projection of the dipole momentum operator on the polarisation vector of the X-ray photons. 
  Reference    Z. Naturforsch. 43a, 388—390 (1988); received January 22 1988 
  Published    1988 
  Keywords    Synchrotron radiation, X-ray absorption, Anomalous dispersion, Ferroelectricity, LiNb03 
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 TEI-XML for    default:Reihe_A/43/ZNA-1988-43a-0388.pdf 
 Identifier    ZNA-1988-43a-0388 
 Volume    43 
4Author    L. DobrzyńskiRequires cookie*
 Title    Recent Advances in Compton Scattering  
 Abstract    A review of achievements in the field of Compton spectrometry in the years that elapsed from the last Sagamore meeting (1988) is presented. Some physical problems that have either appeared as new or became clarified are described. Special emphasis is put to the results obtained by means of magnetic Compton scattering. 
  Reference    Z. Naturforsch. 48a, 266—272 (1993); received January 9 1992 
  Published    1993 
  Keywords    Compton scattering, Electron momentum distribution, Synchrotron radiation, Mag-netic materials 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0266.pdf 
 Identifier    ZNA-1993-48a-0266 
 Volume    48 
5Author    Y. Waseda, K. Shinoda, K. SugiyamaRequires cookie*
 Abstract    a tio n D is tr ib u tio n o f Z n F e 20 4 a n d C o F e 20 4 S p in e ls F r o m A n o m a lo u s X -R a y S c a tte r in g The distribution of Zn2 + and Co2 + cations in ferrite spinels has been determined by applying anomalous X-ray scattering (AXS) near the K absorption edges of Fe, Co and Zn. The energy dependence of the reflection intensities of ZnFe20 4, detected at the Fe K and Zn K absorption edges, can only be explained when all Zn2+ being allocated to the tetrahedral site formed by oxygens. On the other hand, the results for CoFe20 4 suggest that 78% of Co2+ occupy the octahedral site, and that the present CoFe20 4 sample is classified as inverse spinel, although a partial disorder is included. The usefulness of this AXS method coupled with the common Rietveld analysis was well-recognized by determining the cation distribution even in a system with next neighboring elements of the periodic table. 
  Reference    Z. Naturforsch. 50a, 1199—1204 (1995); received November 6 1995 
  Published    1995 
  Keywords    Anomalous X-ray scattering, Rietveld, Synchrotron radiation, Ferrite, Spinel, ZnFe20 4, CoFe20 4 
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 TEI-XML for    default:Reihe_A/50/ZNA-1995-50a-1199.pdf 
 Identifier    ZNA-1995-50a-1199 
 Volume    50