Title :
F-type centers and transformation in BaF/sub 2/:Sr crystals irradiated by electron beam
Author :
Guangcan Wang ; Jin Zhang ; Jingjing Yang
Author_Institution :
Exp. Center, Yunnan Univ., Kunming, China
Abstract :
Summary form only given. Optical absorption spectra of BaF/sub 2/:Sr crystals were studied before and after electron beam irradiation, and the process of F-type center transformation was also analyzed based on the study of absorption spectra. The results showed that 1.5 and 1.8 MeV electron irradiation at the dose of 10/sup 15//spl sim/10/sup 16/ cm/sup -2/ induced F-H pairs, F centers and other centers perturbed by impurities in BaF/sub 2/:Sr crystals, It is suggested that F centers in the crystal can be transferred into F/sub /spl and//(Sr/sup 2+/) centers by He-Ne laser (wavelength: 632.5 nm) excitation, and this process can be reversed by Na light (wavelength: 589.0, 589.6 nm) excitation.
Keywords :
F-centres; barium compounds; electron beam effects; impurities; photoexcitation; strontium; visible spectra; 1.5 to 1.8 MeV; 589.0 nm; 589.6 nm; 632.5 nm; BaF/sub 2/:Sr; BaF/sub 2/:Sr crystals; F-H pairs; F-centers; F-type center transformation; He-Ne laser; Na light excitation; electron beam effects; electron irradiation dose; impurities; optical absorption spectra; photoexcitation; visible spectra; Crystals; Electron beams; Plasmas; Strontium;
Conference_Titel :
Plasma Science, 2000. ICOPS 2000. IEEE Conference Record - Abstracts. The 27th IEEE International Conference on
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-5982-8
DOI :
10.1109/PLASMA.2000.855167
