Abstract
Luminescence has been observed during deformation of X-irradiated alkali halide crystals. And also, it has been observed at fracture or under superimposition of ultrasonic oscillation. These phenomena are useful for studying the deformation of crystals. We have investigated luminescence during the deformation of X-irradiated KCl : Eu 2 + and under superimposition of oscillation. The luminescence intensity rapidly increases at the beginning of plastic deformation. The intensity roughly remains constant for a while and is then followed by gradual decreasing. The variation of luminescence intensity seems to correspond to the deformation stage of the crystal. The spectrum of deformation luminescence (DL) has a peak of 420 nm due to Eu 2 + . Superimposition of oscillation during plastic deformation of crystals causes a decrease in stress along with additional luminescence (sonoluminescence, SL). The SL intensity also appears to correspond to the deformation stage. SL/DL is found to be proportional to stress decrement due to superimposition of ultrasonic oscillation irrespectively of strain. DL has been found to occur mainly at the intersection of slip bands.
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.
