Positron and positronium in porous media: Zeolites

Zs Kajcsos, L. Liszkay, G. Duplâtre, L. Lohonyai, L. Varga, K. Lázár, G. Pál-Borbély, H. K. Beyer, P. Caullet, J. Patarin, A. P. De Lima, C. Lopes Gil, P. M. Gordo, M. F. Ferreira Marques

Research output: Contribution to journalArticle

9 Citations (Scopus)

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 3γ-annihilation on data registration was closely examined. Long lifetimes up to 135ns 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.

Original languageEnglish
Pages (from-to)363-368
Number of pages6
JournalRadiation Physics and Chemistry
Volume68
Issue number3-4
DOIs
Publication statusPublished - Jan 1 2003

Keywords

  • 3γ-annihilation
  • Long-living positronium
  • Porous structure
  • Zeolites

ASJC Scopus subject areas

  • Radiation

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    Kajcsos, Z., Liszkay, L., Duplâtre, G., Lohonyai, L., Varga, L., Lázár, K., Pál-Borbély, G., Beyer, H. K., Caullet, P., Patarin, J., De Lima, A. P., Lopes Gil, C., Gordo, P. M., & Ferreira Marques, M. F. (2003). Positron and positronium in porous media: Zeolites. Radiation Physics and Chemistry, 68(3-4), 363-368. https://doi.org/10.1016/S0969-806X(03)00185-3