Issue
EPL
Volume 78, Number 5, June 2007
Article Number 56004
Number of page(s) 5
Section Condensed Matter: Structural, Mechanical and Thermal Properties
DOI http://dx.doi.org/10.1209/0295-5075/78/56004
Published online 22 May 2007
EPL, 78 (2007) 56004
DOI: 10.1209/0295-5075/78/56004

Planar channeling radiation from electrons in quartz

W. Wagner1, B. Azadegan2, L. Sh. Grigoryan3 and J. Pawelke1

1  Forschungszentrum Dresden-Rossendorf, Institute of Radiation Physics - D-01314 Dresen, Germany
2  School of Sciences, Tarbiat Moallem University - Sabzever, Iran
3  Institute of Applied Problems of Physics, National Academy of Sciences - Yerevan, Armenia


received 25 January 2007; accepted in final form 18 April 2007; published June 2007
published online 22 May 2007

Abstract
The possibility to stimulate channeling radiation by external excitation of ultrasonic waves in a piezoelectric single crystal is predicted by theory. The experimental verification of this effect requires the knowledge of the undisturbed spectrum of channeling radiation. For the first time, planar channeling radiation from 17, 25 and 32 MeV electrons channeled in a quartz single crystal has been measured. The analysis performed bases on the application of the theory of channeling radiation. Real planar continuum potentials of a quartz single crystal, eigenvalues of channeling states and transition energies have been calculated and radiation intensities were evaluated. The corresponding calculations proved to be necessary for the unambiguous identi- fication of the spectra of channeling radiation registered from this hexagonal crystal.

PACS
61.80.Fe - Electron and positron radiation effects.
33.20.Rm - X-ray spectra.
61.82.-d - Radiation effects on specific materials.

© Europhysics Letters Association 2007