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1993 (1)
1989 (1)
1Author    Taro Eguchi, Koichi Mano, Nobuo NakamuraRequires cookie*
 Title     
 Abstract    p p lic a tio n o f M a x im u m E n tro p y M e th o d (M E M) f o r P r e c is e D e te r m in a tio n o f N Q R F re q u e n c ie s The maximum entropy method (MEM) is applied to the analysis of the closely spaced nuclear quadrupole resonance spectra of 35C1 in hexachlorobenzene and 14N in frarts-azobenzene. The superiority of the MEM to usual FFT spectra is discussed with respect to the precision of frequency measurements and the noise characteristics in broad and noisy NQR spectra. 
  Reference    Z. Naturforsch. 44a, 15—18 (1989); received November 3 1988 
  Published    1989 
  Keywords    Maximum Entropy Method, Nuclear Quadrupole Resonance, Phase Transition, Spec­ tral Analysis 
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 TEI-XML for    default:Reihe_A/44/ZNA-1989-44a-0015.pdf 
 Identifier    ZNA-1989-44a-0015 
 Volume    44 
2Author    Masaki Takata, Yoshiki Kubota, Makoto SakataRequires cookie*
 Title    The Electron Density Distribution in Be Metal Obtained from Synchrotron-Radiation Powder Data by the Maximum-Entropy Method  
 Abstract    The nature of the bonding in Be metal was studied by investigating the MEM map, which is the electron density distribution obtained by the Maximum-Entropy Method. In order to avoid extinc-tion effects, 19 Bragg reflections were measured by a new powder-diffraction experiment that utilizes Synchrotron Radiation as an incident X-ray and an Imaging Plate as detector. The experiment was carried out at the Photon Factory BL6A2. In spite of the limited number of reflections used in the MEM analysis, the electron density distribution of Be was obtained accurately and reliably. The structure factors for unmeasured reflections were calculated and compared with the values observed by Larsen and Hansen [Acta Cryst. B40, 169 (1984)]. The agreement is very good. Furthermore, the MEM map revealed that Be metal forms an electronic layer in the shape of a honeycomb that is parallel to the basal plane. 
  Reference    Z. Naturforsch. 48a, 75—80 (1993); received December 28 1991 
  Published    1993 
  Keywords    Maximum entropy method, Be metal, Electron density distribution, X-ray powder diffraction, HCP structure 
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 TEI-XML for    default:Reihe_A/48/ZNA-1993-48a-0075.pdf 
 Identifier    ZNA-1993-48a-0075 
 Volume    48