Title :
Proton and neutron irradiation effects of Ti:sapphires
Author :
Guangean Wang ; Jin Zhang ; Jingjing Yan
Author_Institution :
Exp. Center, Yunnan Univ., Kunming, China
Abstract :
Summary form only given. Various effects of proton and neutron irradiated Ti:sapphires were studied. Proton irradiation induced F, F/sup +/ and V centers in Ti:sapphires and 3310 cm/sup -1/ infrared absorption, and made ultraviolet absorption edge shift to short wave. Neutron irradiation produced a number of F, F/sup +/ and F/sub 2/ centers and larger defects in Ti:sapphires, and changed Ti/sup 4+/ into Ti/sup 3+/ ions. Such valence state variation enhanced characteristic luminescence of Ti:sapphires, and no singular variances of intrinsic fluorescence spectra of Ti:sapphires took place with neutron flux of 1/spl times/10/sup 17/ n/cm/sup 2/, but the fluorescence vanished with neutron flux of 1/spl times/10/sup 18/ n/cm/sup 2/ which means the threshold for the concentration of improving Ti/sup 3+/ ions by neutron irradiation.
Keywords :
F-centres; V-centres; infrared spectra; neutron effects; proton effects; sapphire; spectral line shift; titanium; ultraviolet spectra; 3310 cm/sup -1/; F centers; F/sup +/ centers; IR absorption; Ti:Al/sub 2/O/sub 3/; Ti:sapphire; V centers; impurity ion concentration; intrinsic fluorescence spectra; neutron flux; neutron irradiation effects; proton irradiation effects; short wave; ultraviolet absorption edge shift; valence state variation enhanced characteristic luminescence; Crystals; Educational institutions; Electronics industry; Electrons; Fluorescence; Luminescence; Neutrons; Physics; Protons; Strontium;
Conference_Titel :
Plasma Science, 1999. ICOPS '99. IEEE Conference Record - Abstracts. 1999 IEEE International Conference on
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-5224-6
DOI :
10.1109/PLASMA.1999.829196
