Positronium Thermalization Process in Nanoporous Materials and its Influence on the Shape of PALS Spectrum
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Published:2008-11
Issue:
Volume:607
Page:39-41
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ISSN:1662-9752
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Container-title:Materials Science Forum
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language:
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Short-container-title:MSF
Author:
Kansy Jerzy1,
Zaleski Radosław2
Affiliation:
1. Silesian University of Technology
2. Maria Curie-Sklodowska University
Abstract
A new method of analysis of PALS spectra of porous materials is proposed. The model considers both the thermalization process of positronium inside the pores and the pore size distribution. The new model is fitted to spectra of mesoporous silica MCM-41 and MSF. The resulting parameters are compared with parameters obtained from fitting the “conventional” models, i.e. a sum of exponential components with discrete or/and distributed lifetimes.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science