Re: Strange peaks from grainy Si (data re-attached)

2007-01-25 Thread gregor
Congwu, I'm getting confused with the units of your diffraction patterns, could you just indicate 2theta which is probably the primary observation without any assumption about lambda? Also, I've trouble with your simulated Si pattern: there should be no traces of Zr radiation generated peaks,

Re: Strange peaks from grainy Si (data re-attached)

2007-01-25 Thread Jonathan Wright
... The problems bothering me are the measured peak is much wider than the simulation Peak widths should be 400 microns (your beamsize) divided by 3.5 cm (your distance) in radians, which is about 180*0.4/3.5/PI = 6.5 degrees. HTH, Jon

Re: Strange peaks from grainy Si (data re-attached)

2007-01-25 Thread gregor
Dear Congwu, as you put it, it definitely seems that you don't get out the MoK radiation from your collimator. Control the alignment and make sure the beam hits your sample. best miguel On 25 Jan 2007 at 9:55, [EMAIL PROTECTED] wrote: Hi, Miguel, the unit is the so-called moment transfer