Dear William, Thank you for your kind suggestion.
Well, our XRD is not a very new model, we use a fixed divergent slit, receving slit and antiscattering slits. But I need to check them whether the divergent and anti-scattering slits are in the same sizes. When I added the anti-scatter slit, the bump did reduce in size but still there. In this case, can you teach me what precautions we need to concern when the Ni-filter, beam mask, sample holder (glass plate) and the receiving slits are used? I will make some reading as well, however I do willing to hear some practical experience from XRD users. many thanks, stephen chui Quoting William Bisson <[EMAIL PROTECTED]>: > Dear Chuisy, > > The broad bump you are experiencing at low angle may be to do with the > slits. One has to be careful with these new XRD machines which have > variable slits, to make sure the divergent and the anti-scattering slits > are equal and if you choose to keep the slits fixed, which usually results > in a broad peak, the footprint is small. However, this will result in poor > high angle data. > > It does require a deal of playing around with the slits to see what each > of the effects are. The main purpose of variable slits is to have > consistant data throughout a range of 2Theta, which it will do, however, > it does make refinement just that little harder, having to take into > account changing slit width over 2Theta. If anyone has any good tips on > this matter, I would be very interested to know. > > Regards > William Bisson > > On Thu, 3 Jun 2004 [EMAIL PROTECTED] wrote: > > > Dear all, > > > > We are recently installing a XRD, and there is a huge peak occurred in the > > 3-7deg (2T) which is masking the useful signals from the sample. How can > we > > eliminate the big peak there? > > > > We use 40kW, 30mA CuKa x-ray, divergent and receving slits are used, > > > > many thanks, > > > > stephen Chui > > > > > > >
