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'Relaxation' in keywords Facet   Publication Year 2000  [X]
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1Author    İsmail Sert, M. Maral Sünnetçioglu, Rıza Sungur, Gökçe BingölRequires cookie*
 Title    Dynamic Nuclear Polarization Studies of TANOL/water-glycerol Solutions  
 Abstract    Dynamic Nuclear Polarization (DNP) studies of TANOL/water-glycerol solutions were per-formed at 1.53 mT. The samples have either various water-glycerol ratios at constant concen-tration or various concentrations at a constant water-glycerol ratio. The low field EPR spectra were recorded, the DNP parameters(enhancement factors, coupling constant, leakage factor) were determined, electronic relaxation times were measured. Depending on the values obtained, the interactions between nuclei and electrons are discussed. 
  Reference    Z. Naturforsch. 55a, 682—686 (2000); received April 19 2000 
  Published    2000 
  Keywords    DNP, EPR, Relaxation, Nitroxides 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0682.pdf 
 Identifier    ZNA-2000-55a-0682 
 Volume    55 
2Author    David StephensonRequires cookie*
 Title    Two-dimensional Two Contact Double Resonance Spectroscopy  
 Abstract    A two-dimensional spectroscopic technique is presented. Application of the technique to de-termine all the relaxation rates for a multi-level quadrupole system is discussed along with ex-perimental requirements. Theoretical and experimental data are analyzed for the 14 N, three level, spin 1 system. The analysis shows that all three relaxation rates can be obtained from a single two-dimensional spectrum, and that only 3 peaks in the 3 x 3 two-dimensional intensity matrix are needed to completely specify the problem. The 4-level spin 3/2 system is also examined. In theory, all six relaxation rates can be independently evaluated (for a suitable system) without necessitating measurement at the low frequency Zeeman separated levels. 
  Reference    Z. Naturforsch. 55a, 79—82 (2000); received September 11 1999 
  Published    2000 
  Keywords    NQR, 14 N, Relaxation, Two-dimensional, Cross-relaxation 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0079.pdf 
 Identifier    ZNA-2000-55a-0079 
 Volume    55