Technology Business Journal
March 10, 2009

CRYSTALLOGRAPHY;
Studies from Yerevan State University further understanding of crystallography

"A method for implementing the diffraction of a widely divergent
characteristic X-ray beam from a standard X-ray tube with a linear
focal spot was improved. X rays, passing through a diaphragm 30 pm in
diameter, diffract from a crystal adjacent to the diaphragm,"
scientists in Yerevan, Armenia report.

"The crystal, together with a photographic plate, rotates around the
axis perpendicular to the plate. It is shown that the diffraction
image is a set of hyperbolas in this case. The equations of the
hyperbolas are obtained and investigated," wrote K.T. Avetyan and
colleagues, Yerevan State University.

The researchers concluded: "A method for interpreting the diffraction
images in the case of small crystal asymmetry is proposed."

Avetyan and colleagues published their study in Crystallography
Reports (A Method for Implementing the Diffraction of a Widely
Divergent X-Ray Beam. Crystallography Reports, 2008;53(6):937-941).

For additional information, contact K.T. Avetyan, Yerevan State
University, Ul A Manukyana 1, Yerevan 375025, Armenia.

The publisher’s contact information for the journal Crystallography
Reports is: Maik Nauka, Interperiodica, Springer, 233 Spring St., New
York, NY 10013-1578, USA.

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