Results of an experimental and theoretical analysis are presented, concerning the six‐beam (220/242/044/―224/―202) diffraction of X‐rays in thick perfect Ge crystals, under the conditions when a part of the diffracted beams is Bragg reflected. Three cases are considered, when one, three, or all five diffracted beams are Bragg reflected. It is shown theoretically that an enhancement of anomalous transmission for the Laue beams takes place in all these cases. Experimentally this effect is observed in the third case on the incident beam topogram, when the two‐beam Borrmann effect corresponds to Bragg reflection and is more weakly revealed than in the Laue case. Experimentally as well as theoretically an unusual behaviour of the integral intensity for the (044) beam is observed, when the number of Bragg beams varied from one to five.
Es wird ein neues Vier-Block-Laue-Rontgenstrahlen-Interferometer vorgeschlagen und untersucht. Die Bedingungen der idealen Geometrie derartiger Interferometer werden diskutiert. Ein Interferometer mit symmetrisch angeordneten Blocken wird ausfuhrlich diskutiert. Die Vorteile des Vier-Block-Interferometers im Vergleich zu einem Drei-Block-Interferometer werden ebenfalls diskutiert.
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