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'Isotope effects' in keywords Facet   section ZfN Section A:Volume 049  [X]
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1994 (1)
1Author    Y. Kume, T. A. Sajia, R. IkedaRequires cookie*
 Title    Low Temperature Isotope Effect in Ammonium Hexachloroselenate(IV) Studied by 35C1 NQR  
 Abstract    The temperature dependence o f the 35C1 N Q R frequency and spin-lattice relaxation time TlQ of (N H 4)2SeCl6 and (N D 4)2SeCl6 were measured from 400 K to 24.8 and 53.8 K, respectively. The disappearance of N Q R signals in the low temperature region of both salts is attributed to phase transitions. We concluded from the temperature behavior of just above the transition point that the operative mechanism o f the transition is different in these salts: The transition of (N D 4)2SeCl6 seems to be associated with rotary soft modes, while in the natural salt non-rotary soft modes seem to play an important role at the transition. 
  Reference    Z. Naturforsch. 49a, 297 (1994); received August 13 1993 
  Published    1994 
  Keywords    Isotope effect, Spin-lattice relaxation, N Q R, Phase transition, Ammonium hexa­ chloroselenate, Deuterated am m onium hexachloroselenate 
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 TEI-XML for    default:Reihe_A/49/ZNA-1994-49a-0297.pdf 
 Identifier    ZNA-1994-49a-0297 
 Volume    49