%0 Journal Article
%T Beyond the Point Ps Approximation
%A Sergey V. Stepanov
%A Dmitry S. Zvezhinskiy
%A Vsevolod M. Byakov
%J Physics
%D 2012
%I arXiv
%R 10.4028/www.scientific.net/MSF.733.7
%X In application to positron annihilation spectroscopy, Ps atom is considered not as a point particle, but as a finite size e+ e- pair localized in a bubble-state in a medium. Variation of the internal Coulombic e+ -e- attraction vs. the bubble radius is estimated.
%U http://arxiv.org/abs/1203.5385v1