| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1884816 | Radiation Physics and Chemistry | 2007 | 5 Pages |
Abstract
The results of models, extending the Tao–Eldrup model to free volume radii R>1nm, are discussed. The influence of free volume size and geometry on ortho-positronium lifetime was examined. Theoretical curves were compared to available experimental data. Then the models were used to obtain information about free volume sizes in MCM-41 porous silica. Numerical analysis of MCM-41 lifetime spectra is difficult due to their considerable complexity. In order to verify the results, various methods of PAL spectra analysis, e.g., deconvolution, fitting, etc., were involved.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Radosław Zaleski, Jan Wawryszczuk, Tomasz Goworek,