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1Author    I. A. Kjuntsel, V. A. Mokeeva, I. G. Shaposhnikov, G. B. SoiferRequires cookie*
 Title    Influence of Thermoactivated Molecular Motions on the 35 C1 Quadrupole Relaxation  
 Abstract    The effect on the 35 C1 quadrupole relaxation of modulations of the electric field gradient by thermally activated motions of nearby nonbonding symmetric and asymmetric atomic groups has been investigated. This way the activation energy of the motions has been determined and the fraction of the electric field gradient influenced by the motions has been estimated. This fraction can be taken as a measure of the intensity of nonbonding interactions in solids. 
  Reference    Z. Naturforsch. 45a, 531—535 (1990); received August 23 1989 in revised form December 8 1989 
  Published    1990 
  Keywords    Molecular motion, Modulation effect, Nuclear quadrupole relaxation 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-0531.pdf 
 Identifier    ZNA-1990-45a-0531 
 Volume    45 
2Author    Noriaki Okubo, Yoshihito AbeRequires cookie*
 Title    35C1 Nuclear Quadrupole Relaxation in Antimony Trichloride  
 Abstract    The 35C1 NQR frequency and spin-lattice relaxation time in SbCl3 have been measured between 10 K and the melting point. The relaxation at low temperatures is attributed to the Raman process. A Debye temperature of 141 K and covalencies 0.390 and 0.356 are obtained. The latter values correspond well to those obtained from the NQR frequencies. For the relaxation above 200 K two more mechanisms are considered. 
  Reference    Z. Naturforsch. 49a, 680—686 (1994); received March 14 1994 
  Published    1994 
  Keywords    Antimony trichloride, Nuclear quadrupole relaxation, Raman process, Debye temper­ ature, Covalency 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-0680.pdf 
 Identifier    ZNA-1994-49a-0680 
 Volume    49 
3Author    Noriaki Okubo, Mutsuo Igarashi, Ryozo YoshizakiRequires cookie*
 Title      
 Abstract    The 81 Br nuclear spin-lattice relaxation time in AlBr3 has been measured between 8 K and room temperature. The result is analyzed using the theory of the Raman process based on covalency. A Debye temperature of 67.6 K and covalency of0.070 and 0.072 for terminal and 0.022 for bridging bonds are obtained. The correspondence of the latter values to those obtained from the NQR frequencies is low, in contrast to the previously examined compounds. 81 B r N u c le a r Q u a d r u p o le R e la x a tio n in A lu m in iu m T rib ro m id e 
  Reference    Z. Naturforsch. 50a, 737—741 (1995); received February 20 1995 
  Published    1995 
  Keywords    Aluminium tribromide, Nuclear quadrupole relaxation, Raman process, Debye temper­ ature, Covalency 
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 TEI-XML for    default:Reihe_A/50/ZNA-1995-50a-0737.pdf 
 Identifier    ZNA-1995-50a-0737 
 Volume    50 
4Author    Noriaki Okubo, Mutsuo Igarashi, Ryozo YoshizakiRequires cookie*
 Title    Relaxation of 2 7 AI NMR in Aluminium Tribromide due to Raman Process  
 Abstract    The nuclear spin-lattice relaxation of 27 A1 NMR in AlBr 3 has been examined from 25 to 320 K. The result is analyzed using a theory of the Raman process based on covalency. A Debye temper-ature of 118 K is obtained together with a covalency larger than that obtained from the relaxation in the 81 Br NQR. 
  Reference    Z. Naturforsch. 51a, 277—282 (1996); received November 15 1995 
  Published    1996 
  Keywords    Aluminium tribromide, 27 A1 NMR, Nuclear quadrupole relaxation, Raman process, Covalency 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0277.pdf 
 Identifier    ZNA-1996-51a-0277 
 Volume    51