title: Positronics of subnanometer atomistic imperfections in solids as a high-informative structure characterization tool.
abstract: Methodological possibilities of positron annihilation lifetime (PAL) spectroscopy applied to characterize different types of nanomaterials treated within three-term fitting procedure are critically reconsidered. In contrast to conventional three-term analysis based on admixed positron- and positronium-trapping modes, the process of nanostructurization is considered as substitutional positron-positronium trapping within the same host matrix. Developed formalism allows estimate interfacial void volumes responsible for positron trapping and characteristic bulk positron lifetimes in nanoparticle-affected inhomogeneous media. This algorithm was well justified at the example of thermally induced nanostructurization occurring in 80GeSe2-20Ga2Se3 glass.
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine ; Jan Dlugosz University, Al. Armii Krajowej, 13/15, Czestochowa, 42201 Poland.
authors: Oleh
authors: O
authors: Shpotyuk
authors: Jan Dlugosz University, Al. Armii Krajowej, 13/15, Czestochowa, 42201 Poland.
authors: Jacek
authors: J
authors: Filipecki
authors: Opole University of Technology, Ozimska str., 75, Opole, 45370 Poland.
authors: Adam
authors: A
authors: Ingram
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine.
authors: Roman
authors: R
authors: Golovchak
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine.
authors: Mykola
authors: M
authors: Vakiv
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine ; Lviv Polytechnic National University, Bandera str., 12, Lviv, 79013 Ukraine.
authors: Halyna
authors: H
authors: Klym
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine ; Lviv State University of Vital Activity Safety, Kleparivska str., 35, Lviv, 79007 Ukraine.
authors: Valentyna
authors: V
authors: Balitska
authors: Lviv Institute of Materials of SRC "Carat", Stryjska str., 202, Lviv, 79031 Ukraine ; Lviv Polytechnic National University, Bandera str., 12, Lviv, 79013 Ukraine.
authors: Mykhaylo
authors: M
authors: Shpotyuk
authors: Opole University of Technology, Ozimska str., 75, Opole, 45370 Poland.
authors: Andrzej
authors: A
authors: Kozdras
keywords: Nanomaterials; Positron annihilation lifetime; Positronics; Subatomic void; Trapping