Survey of results on oxalic acid dihydrate
1981; Wiley; Volume: 37; Issue: a1 Linguagem: Inglês
10.1107/s0108767381095871
ISSN1600-5724
Autores Tópico(s)Methane Hydrates and Related Phenomena
ResumoStandard X-ray crystallography covers the energy range from 5 to 25 keV, making use of commonly available characteristic lines.Hm•Jever, the use of Hhite-beam diffraction techniques, in particular in connection Hith synchrotron radiation sources, has called for the extension of the upper energy limit to about 100 keV.Attenuation coefficients determined in this extended energy range should be of great value also in dosimetry, fluorescence-analysis, microanalysis etc.The value of the attenuation coefficient changes by several orders of magnitude ;;vi thin the energy range considered here, in particular Hhen all the elements of the periodic table are taken into account.Thus there is no universal method for measuring X-ray attenuation coefficients, and a number of precautions have to be taken.The paper discusses briefly the £ollmving
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