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Accession number;99A1007959
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| Title;Positronium as a probe of small free volumes. |
| Author;
GOWOREK T
(Maria Curie Sklodowska Univ., Lublin, Pol)
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Journal Title;Abstracts of Papers. Symposium on Radiochemistry
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Journal Code:F0139B
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ISSN:1345-2762
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VOL.43rd;NO.;PAGE.42(1999)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;Positronium, a hydrogen-like structure composed of negative and positive electron, is often used as a tool in the studies of free volume holes in solids (crystalline and amorphous ones). The smaller is free volume, the stronger interaction with surrounding bulk material and shorter lifetime. The relation between free volume size and ortho-Ps lifetime is usually described in the framework of simplified model, proposed by Tao and Eldrup et al. In that model the positronium trap has spherical shape and the potential is rectangular one with infinite depth. In this paper an evaluation of possible distortions introduced by the model is discussed. The model can be easily extended toward nonspherical and large-size freevolumes. (author abst.) |
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