Re: Problem of low-angle

2004-06-03 Thread William Bisson
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

Re: Problem of low-angle

2004-06-03 Thread Srebri Petrov
Hi, Looking at the attached file, my opinion is that this effect is caused by a quite large divergent (or both divergent and anti-scattering) slits. It is not normal to have over 1000 counts at 5 degrees 2-theta. This could be due either by a portion of incident beam or by a scattering from the

Re: Problem of low-angle

2004-06-03 Thread chuisy
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

Re: Problem of low-angle

2004-06-03 Thread William Bisson
Dear Stephen, I apologise for calling you chuisy last time round. One suggest to test the size of the footprint is, I think, to use common rock salt. Grind this up and place liberally over your plate and you can check at low angle where the X-rays are striking the plate, because the salt will go