[sdpd] Re: how to purchase a high resolution diffractometer

["Armel Le Bail" <alb...@cristal.org>]

--- In sdpd...@egroups.com, cockcroft...@i... wrote:

> Both of our machines have primary beam monochromators - yes, 
> there is a loss of intensity, but I prefer the extra 
> "resolution" I get the higher angles due to the pure alpha1 
> wavelength.

About the Kalpha-2 component, I have a different point of view.
In order to explain it, I have installed some figures in a Web
page entitled : "K-alpha : believe your eyes or trust mathematics ?".
I don't think that you have any extra resolution at the higher
angles. This is only an illusion, and you should not trust your
eyes, you have to trust physics and mathematics.

          http://www.cristal.org/powdif/kalpha.html

Comments welcome.

Best,

Armel Le Bail
http://www.cristal.org/course/



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