Hi Abhijeet: How were the data taken? Is there a possibilty that the samples were prepared in such a way as to give an attenuation of the EXAFS. This can happen both in flurescence as well as transmission if the sample preparation is not carefully done. For example pinholes in a transmission sample will result in a distortion of the spectrum because different parts of the incident beam are "seeing" different thicknesses of sample. In fluoresence, attenuation is common when there is a lot of self-absorption. Carlo On Fri, 13 Nov 2009, abhijeet gaur wrote:

Hi all, I am fitting Cu2O EXAFS data taken at SSRL using the Artemis. But there is a problem with fitting results that SO2 parameter is coming very low around 0.50. I had also taken Cu2O data from different data bases to check whether theere some problem with my data, but after fitting them, the same problem of low SO2 is coming. In some research papers given SO2 parameter for Cu2O equal to 0.82. But I am unable to get that why all the Cu2O data giving low value of SO2. Is there any other fitting procedure to fit the compounds like Cu2O ?????? With thanks Abhijeet Gaur

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