Abstract
Giant-sized nonrelaxed electronic states in alkali halides were investigated. By considering an example of KCl-Yb and KBr-Yb, it was found that photocurrent in these luminophors is excited in all impurity absorption bands. An examination of temperature dependencies of photoconduction and thermostimulated conduction curves revealed that the inner photoeffect is of a photothermal nature and realized through the ejection of electrons into the conduction band not from the excited states of the activator but electron capture centres at temperatures where these centres are thermally unstable. The thermal activation energy of capture centres was determined. Based on electron conduction measurements of crystals the Debye temperature was estimated to be Θ = 209 ± 20 K for KCI and 232 ± 20 K for KBr. The electron delocalization in the case of the intracentre excitation is regarded as evidence for the presence of nonrelaxed electron states of a giant size comparable with distances between defects.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
