Re: [Ifeffit] [Ext] Re: XAS question

2020-10-29 Thread Carlo Segre
I agree, this is a sign of a poor background subtraction. I find that this can be mitigated by cutting back on your spl;ine range for background subtraction. Change it by 0.5 at a time or less and keep plotting in k-space. You might have to lose a bit of range but that just means that the data i

Re: [Ifeffit] [Ext] Re: XAS question

2020-10-29 Thread Matthew Marcus
It's possible that your data really has a kink in it. Zoom in on that last bit in E space before any background subtraction and see if there's something odd-looking. If there's really an artifactual kink, then there's not much you can do. mam On 10/29/2020 7:47 AM, Carlo Segre wrote:

Re: [Ifeffit] XAS question

2020-10-29 Thread Edmund Welter
Dear Danting, did you look on the background that is subtracted? I guess it is your background that is doing something weird here. To look at the background tick "Background" in the plot. In the region you mention it should be a smooth line without visible oscillations. Cheers, Edmund On

[Ifeffit] XAS question

2020-10-29 Thread Chen, Danting
Hi Mr/Ms, I am a new learner of XAS and meet a problem like before and hope you can give me some hints. [cid:image001.png@01D6ADDA.9D016B40] [cid:image005.png@01D6ADDA.9D016B40] I have a data set after merged and alignment. But at 11-13 A-1, the amplitude of k is much higher than normal but th