Competitive positron and positronium trapping in porous media (CROSBI ID 135348)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kajcsos, Zsolt ; Liszkay, Laszlo ; Duplatre, Gilles ; Lazar, Karoly ; Lohonyai, Laszlo ; Varga, Laszlo ; Gordo, Paulo M. ; de Lima, Adriano P. ; Lopes de Gil, C. ; Ferreira Marques, Maria Fatima ; Bosnar, Damir ; Bosnar, Sanja ; Kosanović, Cleo ; Subotić, Boris
engleski
Competitive positron and positronium trapping in porous media
Positron annihilation acquired acceptance for structural investigation of solids but results in porous media-where positron lifetime spectroscopy (LT) reveals substantial Ps formation-were ambiguous. Data on zeolites lead to the conclusion that Ps trapping in competing "extended free volume" sites, inhomogeneous regions and grain boundaries occurs. Furthermore, positron trapping must also be considered. Systematic errors due to incomplete time range selection are discussed, significance and importance of corrections for 3 gamma/2 gamma counting efficiency differences are shown in practice.
positron annihilation in zeolites; positronium trapping; long-living o-Ps states
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