Hi,
A Laue diffraction pattern is a diffraction pattern recorded using
polychromatic ("white") radiation. Hence the beam line optics is for
focusing the radiation onto the sample (the crystal) but not to select a
single wavelength (a monochromator). Just to make it simple to understand.
Contrary to monochromatic data collection, the sample (the crystal) is
not moving, bringing the reciprocal lattice into diffraction condition
is carried out by having this range of wavelengths instead. In order to
visualise this, you can make a simple drawing of the reflection
conditions, with 2 limiting spheres (that for the minimal wavelength and
that for the maximum wavelength of the incoming radiation). All
reciprocal lattice points that are in between these 2 limiting spheres
are in reflection condition using the polychromatic radiation. Now of
course, between diffraction frames, you can rotate your crystal (and
also translate it to expose a fresh part of the crystal to the radiation
- for X-rays). So the crystal during exposure is stationary.
Also note that at ILL (Grenoble) there is Laue (polychromatic) neutron
diffraction. So it's not limited to X-rays.
Fred.
Pius Padayatti wrote:
To all Laue experts up here
How does a Laue data is collected?
Thanks in advance to all
PSP
On Fri, Jan 28, 2011 at 3:43 AM, REX PALMER <rex.pal...@btinternet.com
<mailto:rex.pal...@btinternet.com>> wrote:
What programs are available for processing Laue data to produce an
intensity data set?
Are explanatory notes or publications available?
Rex Palmer
Birkbeck College
--
Pius S Padayatti
