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1990 (2)
1Author    N. G. FazleyevRequires cookie*
 Title    Theoretical Study of the Indirect Quadrupole-Quadrupole Interactions in Metals and Alloys  
 Abstract    The indirect multipole interactions of nuclei and impurity paramagnetic ions in metals and alloys via conduction electrons are investigated by means of the dielectric function method. The Hamilto-nian of the indirect quadrupole-quadrupole interaction of impurity paramagnetic ions and nuclei is constructed selfconsistently, taking into account the exchange interactions and correlations of the conduction electrons as well as the antishielding effects. It is shown that the energy of these indirect quadrupole interactions of the nuclei and the paramagnetic ions decreases with the distance as R ~ 3 , oscillating with a period which is determined by the wave vector on the Fermi surface and the distance R. The influence of these indirect quadrupole-quadrupole interactions on the width and shape of the NMR lines is studied. 
  Reference    Z. Naturforsch. 45a, 380—384 (1990); received August 23 1989 in revised form December 1 1989 
  Published    1990 
  Keywords    Quadrupole, Interactions, Nuclei, Metals, Resonance 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0380.pdf 
 Identifier    ZNA-1990-45a-0380 
 Volume    45 
2Author    Theresa Varty, R. Julian, C. Brown, FrancisP. TemmeRequires cookie*
 Title    Optimal Zeeman-NQR Powder Lineshape Calculations for 3/2^/^7/2  
 Abstract    The powder lineshapes, associated with Zeeman-NQR A\m\= +1 transitions for half-integer spin from 3/2 and 7/2 are derived using an optimized (6, (j)) sampling algorithm for the intensity response. The 1 = 3/2 system is examined over the full asymmetry range, whereas the I >3/2 lineshapes are calculated for rj^0.35. The algorithm adopted is modelled on the concepts in the earlier NMR lineshape calculations of Alderman, Solum, and Grant**. 
  Reference    Z. Naturforsch. 45a, 550—558 (1990); received August 23 1989 
  Published    1990 
  Keywords    NQR, Zeeman, quadrupole, powder, lineshape 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0550.pdf 
 Identifier    ZNA-1990-45a-0550 
 Volume    45