An application of the simple model of positronium-induced cavities to orthopositronium annihilation rates in ethane gas
- 28 February 1987
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 20 (4) , 867-876
- https://doi.org/10.1088/0022-3700/20/4/025
Abstract
The authors have analysed the density and temperature dependences of orthopositronium annihilation rates in ethane gas following the simple model of positronium-induced cavities. The results obtained for the potential barrier, size of the cavity and positronium binding energy show that a bound state of positronium does not exist in this cavity. This is further supported by calculations presented for the changes in free energy due to positronium trapping following the self-consistent field model. An analysis of these annihilation rate data following a simple model of density fluctuations provides a reasonably good description of the observations for relatively small density fluctuations.Keywords
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