Positronium in Small and Large Voids in Vycor Glass |
| K. Ciesielskia, A.L. Dawidowiczb and T. Goworeka a Institute of Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland b Department of Chemical Physics, Maria Curie-Skłodowska University, Pl. M. Curie-Skłodowskiej 3, 20-031 Lublin, Poland |
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| The intensities of ortho-positronium components related to the pores and to small voids in the bulk were determined for a series of Vycor glasses. The ratio of "pore fraction" to the total o-Ps yield depends on the specific surface area of the porous medium. The diffusion coefficient for o-Ps was found equal to 3.7×10-5 cm2/s. |
| DOI: 10.12693/APhysPolA.95.483 PACS numbers: 78.70.Bj |