Abstract
The unified multichannel positron annihilation model in humidity-sensitive nanoporous MgAl2O4 ceramics with a spinel structure was generalized. It is shown that this model unifies the channels of positron trapping and ortho-positronium decaying. Within this approach, the first component in the lifetime spectra reflects microstructure specificity of the spinel structure with character octahedral and tetrahedral cation vacancies, the second component responsible to extended defects near intergranual boundaries and the third component correspond to "pick-off" annihilation of ortho-positronium in the water-filled nanopores of ceramics.
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.
