Positron-electron annihilation in the proximity of a second electron in a dense medium
- 1 June 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 43 (16) , 12715-12722
- https://doi.org/10.1103/physrevb.43.12715
Abstract
Annihilation rates for a positron interacting with two unpaired-spin electrons in a dense environment have been calculated in terms of parameters having the physical meaning of electron-positron contact densities. The influence on annihilation rates of an external magnetic field has been explicitly taken into account. The results of the theory have been fitted to recent experimental data showing the formation in some polymers of a positron bound state with ‘‘anomalous’’ spin characteristics.Keywords
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