Redistribution of o-Ps in Porous Vycor Glass. Crystallization of Silica at High Temperatures

• Authors: M. Śniegocka , B. Jasińska
• Languages of publication: EN

Abstracts

EN

The positron annihilation lifetime spectroscopy was applied to study the porous Vycor glass annealed at the temperatures between 950 and 1050 K. With increased temperature the spectra show significant decrease in o-Ps lifetime and intensity in the pores, while the rise of intensity in the small intermolecular voids is observed. Similar changes are observed as a function of annealing time at fixed temperature depending on the time and temperature of thermal treatment. They can originate from partial crystallization of the silica in the material under study.

Keywords

EN

78.70.Bj; 71.60.+z

Discipline

• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 5
• Pages: 721-727

Dates

published

2006-11

received

2006-06-05

Contributors

author

M. Śniegocka

• Institute of Physics, Maria Curie-Skłodowska University, pl. Marii Curie Skłodowskiej 1, 20-031 Lublin, Poland

author

B. Jasińska

• Institute of Physics, Maria Curie-Skłodowska University, pl. Marii Curie Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.110.721