Examinando por Autor "Granada, J. R."
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Ítem Acceso Abierto Neutron diffraction studies of tetrachloride liquids.(Royal Society of Chemistry, 1978) Clarke, J. H.; Dore, J. C.; Gibson, I. P.; Granada, J. R.; Stanton, G. W.Neutron diffraction measurements are reported for VC14, CC14, SiCl4, TiCl4, GeCl4, SnCl4 and special mixtures of TiCl4 + SiCl4 and TiCl4 + SnCl4 using both reactor (steady-state) and linac (pulsed) neutron techniques. Information is extracted for the molecular structure and, in certain cases, for the real-space distribution function of the chlorine atoms.Ítem Acceso Abierto Neutron diffraction studies of tetrachloride liquids. IV: The molecular beat effect for TiCl4; SiCl4 and Tic4; SnCl4 mixtures.(Taylor & Francis, 1980) Granada, J. R.; Dore,|J. C.; Clarke, J. H.Neutron diffraction measurements of mixtures of T iC l4/SiCl4 and TiC l4/SnC l4 liquids have been made using the total scattering spectrometer of the Harwell Electron Linac. The high 0 -value (5-20 Á-1) data exhibit a beat effect and have been analysed in terms of summed molecular form factors. The bond-length parameters are found to be in good agreement with other values and confirm the treatment adopted in the analysis of the data for the pure liquids.Ítem Acceso Abierto Structural studies of tetrachloride liquids. III - Molecular structure of CCl4, SiCl4, TiCl4, GeCl4 and SnCl4.(Taylor & Francis, 1979) Granada, J. R.; Stanton, G. W.; Clarke, J. H.; Dore J. C.The differential scattering cross-sections for neutrons scattering by liquid CC14, SiCl4, TiC l4, GeCl4 and SnCl4 at 20°C have been obtained using the pulsed neutron beam from the Harwell Linac. The measured data at two scattering angles (150° and 90°) have been analysed using a molecular form factor with wavelength-dependent Debye-Waller factors. Molecular bond length parameters extracted from a x2-fit to the observations are compared with data obtained by other techniques. Special consideration is given to the calibration of the momentum-transfer scale and the data are found to be sensitive to the variation of mean emission times for different wavelength neutrons leaving the moderator material. Correction for this effect gives an improved fit to the form factor but does not alter the fitted bond length values.