Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/4465
Title: | Positron and positronium in porous media: zeolites | Authors: | Kajcsos, Zs. Liszkay, L. Duplâtre, G. Lohonyai, L. Varga, L. Lázár, K. Pál-Borbély, G. Beyer, H. K. Caullet, P. Patarin, J. Lima, A. P. de Gil, C. Lopes Gordo, P. M. Marques, M. F. Ferreira |
Keywords: | Zeolites; Long-living positronium; Porous structure; 3[gamma]-annihilation | Issue Date: | 2003 | Citation: | Radiation Physics and Chemistry. 68:3-4 (2003) 363-368 | Abstract: | Correlations between positronium (Ps) production features and positron annihilation (PA) parameters were investigated in various zeolite samples (MFI, mordenite, Na-Y). The contribution of 3[gamma]-annihilation on data registration was closely examined. Long lifetimes up to 135 ns and triplet Ps (o-Ps) fractions up to 30% were found. Even low amounts of adsorbed gases or water drastically change the PA pattern. It is concluded that in addition to the crystallographic free sites, large structural discontinuities also play an important role as they can trap Ps and provide it with vacuum-like survival conditions. | URI: | https://hdl.handle.net/10316/4465 | DOI: | 10.1016/S0969-806X(03)00185-3 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
file07b4dca2195e437fa6ef92c0fb099cdd.pdf | 150.38 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.