Borrmann effect
The Borrmann effect (or Borrmann–Campbell effect after
Bragg reflection
.
The Borrmann effect—a dramatic increase in transparency to X-ray beams—is observed when X-rays satisfying Bragg's law diffract through a perfect crystal. The minimization of absorption seen in the Borrmann effect has been explained by noting that the electric field of the X-ray beam approaches zero amplitude at the crystal planes, thus avoiding the atoms.
References
- Nasonov, Nikolai N. (20 September 1999). "Borrmann effect in parametric X-ray radiation". Physics Letters A. 260 (5). Elsevier: 391–394. .
- Pettifer, Robert F.; Collins, Stephen P.; Laundy, David (2009). "Quadrupole transitions revealed by Borrmann spectroscopy". S2CID 4346649.
- Borrmann, Gerhard; Über Extinktionsdiagramme von Quarz, Physikalische Zeitschrift 42, 157–162 (1941); Die Absorption von Röntgenstrahlen im Fall der Interferenz, Zeitschrift für Physik 127, 297–323 (1950) - original articles on Borrmann effect
- Campbell, Herbert N.; X‐Ray Absorption in a Crystal Set at the Bragg Angle, Journal of Applied Physics 22, 1139 (1951)
- von Laue, Max; Die Absorption der Röntgenstrahlen in Kristallen im Interferenzfall, Acta Crystallographica 2, 106–113 (1949) - original explanation of Borrmann effect