Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/4387
Title: | Competitive positron and positronium trapping in porous media | Authors: | Kajcsos, Zs. Liszkay, L. Duplâtre, G. Lázár, K. Lohonyai, L. Varga, L. Gordo, P. M. Lima, A. P. de Gil, C. Lopes de Marques, M. F. Ferreira Bosnar, D. Bosnar, S. Kosanovic, C. Subotic, B. |
Keywords: | Positron annihilation in zeolites; Positronium trapping; Long-living o-Ps states | Issue Date: | 2007 | Citation: | Radiation Physics and Chemistry. 76:2 (2007) 231-236 | Abstract: | 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. | URI: | https://hdl.handle.net/10316/4387 | DOI: | 10.1016/j.radphyschem.2006.03.041 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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