Electric field effect on positronium formation in liquids

Details Electric field effect on positronium formation in liquids Electric field effect on positronium formation in liquids

2002-09-30

arxiv.org/abs/physics/0209105v1

Journal of Chemical Physics, v.116(4), pp.6178-6195, 2002

Physics

Chemical Physics

Scientific paper

10.1063/1.1451244

The comparison of different models (the Ore, spur and blob models) of positronium (Ps) formation is presented. Because in molecular media Ps is formed in the terminal positron blob and not in an ordinary spur, the application of the blob model seems to be the most adequate. We extend this model for consideration of the Ps formation in the presence of external electric field ($<100$ kV/cm). In the simplified limiting case, this approach provides a formula similar to the Onsager one for the geminate recombination probability. The influence of ion-electron recombination and other intrablob processes on Ps formation is taken into account. The role of quasifree positronium in Ps formation process is discussed.

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