| Conventional laboratory diffractometers are suitable
for more than 95%
of all diffraction studies. However, some special cases require
higher brilliancy X-ray sources than sealed or rotating anode sources.
Such X-rays of required wavelength ( versus constant wavelength X-ray
tubes) are available at Synchrotron facilities. Incident X-ray is scattered
by electrons of atoms constituting crystalline matter. The positions of
diffraction peaks are governed by Braggs Law and are determined by type and
size of a unit cell. The intensity of diffraction peaks in powder
diffraction pattern depends upon scattering properties of atoms populating
the certain (according to Space Group) cell. It is also worth mentioning that the atomic scattering
power falls off with increasing scattering angle, because the electron
cloud of atoms has a finite size. Neutrons are diffracted not from
electrons, but from nuclei. The nuclear scattering properties of atoms
are different from their X-ray scattering properties. In certain cases neutron
diffraction experiments could solve problems which seem to be difficult or
impossible using x-ray diffraction.
We have access to synchrotron and neutron facilities. You may use our
services to collect synchrotron and/or neutron diffraction data. We can
help you with data collection, analysis, or writing a proposal for these
facilities. Below we describe available
facilities if you wish to contact them directly.
Please refer to the following sections accordingly, you can access
these descriptions from links below or from main menu.
The vendors of
laboratory diffractometers
Special attachment to the laboratory diffractometers
Synchrotron sources
Neutron diffraction facilities |
