BACK-FACE BRAGG-DIFFRACTION FROM A PERFECT AND ULTRALIGHTLY DEFORMED THICK CRYSTAL

Authors
AGAMALIAN M IOLIN E RUSEVICH L GLINKA CJ WIGNALL GD
Citation
M. Agamalian et al., BACK-FACE BRAGG-DIFFRACTION FROM A PERFECT AND ULTRALIGHTLY DEFORMED THICK CRYSTAL, Physical review letters, 81(3), 1998, pp. 602-605
Citations number
14
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
3
Year of publication
1998
Pages
602 - 605
Database
ISI
SICI code
0031-9007(1998)81:3<602:BBFAPA>2.0.ZU;2-6
Abstract
The intensity of neutrons Bragg diffracted from the back face of a 9 m m thick slab-shaped Si(lll) analyzer crystal has been measured experim entally at the ORNL double crystal diffractometer and calculated theor etically. The back-face rocking curve of a strain-free perfect crystal contains two symmetrical peaks which become asymmetrical under an ult rasmall static deformation strain (bending with a radius of tens of km ). The asymmetry is shown to be a sensitive measure of both the magnit ude and direction of bending.