Study of dislocation loops in alkali halide crystals by diffuse X-ray scattering
Creators
- 1. Technische Hochschule Darmstadt (Germany, F.R.). Inst. fuer Festkoerperphysik 1
Description
It has been known for some time that characteristic intensity oscillations occur in diffuse scattering patterns due to the displacement field of strong defects like clusters and dislocation loops. Besides the scattering of the displacement field the core structure of extended defects may cause an extra line close to the Bragg-peaks. Only recently it has been found theoretically that for dislocation loops there is a correlation between oscillations and the extra line. The position of the extra line relative to a nearby reciprocal lattice point depends on the orientation of the Burgers vector and of the reciprocal lattice vector as well. X-ray diffuse scattering results on irradiated alkali halide crystals containing large defect clusters are presented. Results are discussed in terms of loops with dose-dependend size. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Wie seit einiger Zeit bekannt treten in den Linienstrukturen der diffusen Streuung aufgrund des Verchiebungsfelds starker Defekte, wie Clustern und Schraubenversetzungen, charakteristische Intensitaetsoszillationen auf. Ausser der Streuung am Verschiebungsfeld kann die core-Struktur des ausgedehnten Defekts zu einer zusaetzlichen Linie nahe am Bragg-Reflex fuehren. Erst kuerzlich wurde theoretisch gezeigt, dass fuer Schraubenversetzungen eine Korrelation zwischen den Oszillationen und der zusaetzlichen Linie existiert. Die Lage dieser Linie relativ zu einem benachbarten reziproken Gitterpunkt haengt von der Orientierung des Burgervektors und des reziproken Gittervektors ab. Die Ergebnisse von diffusen Roentgenstreueperimenten an bestrahlten Alkalihalogenid-Kristallen mit starken Defekt-Anlagerungen werden vorgestellt und in Verbindung mit einer Dosis-abhaengigen Groesse der Schraubenversetzungen diskutiert. (orig.)
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Additional details
Publishing Information
- Imprint Pagination
- 3 p.
- Report number
- AED-Conf--76-360-014
Conference
- Title
- 2. europhysical topical conference on lattice defects in ionic crystals.
- Dates
- 30 Aug 1976.
- Place
- Berlin, Germany, F.R.
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 8311605
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ALKALI METAL COMPOUNDS; BURGERS VECTOR; DISLOCATIONS; HALIDES; IONIC CRYSTALS; X-RAY DIFFRACTION
- Descriptors DEC
- COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; CRYSTALS; DIFFRACTION; HALOGEN COMPOUNDS; LINE DEFECTS; SCATTERING
Optional Information
- Notes
- 4 figs.; 4 refs.