Track Effects in Positronium Formation
S.V. Stepanova,b,c, V.M. Byakova,c,d, G. Dupl√Ętre e, P.S. Stepanov f and A.V. Bokova,c
aNRC "Kurchatov Institute" - Institute of Theoretical and Experimental Physics, B. Cheremuskinskaya str., 25, 117218 Moscow, Russia
bNational Research Nuclear University "MEPhI", 115409, Moscow, Russia
cLomonosov Moscow State University, Chemical Department, Leninskie Gory, Moscow, Russia
dD. Mendeleyev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047, Moscow, Russia
eInstitut Pluridisciplinaire Hubert Curien, CNRS/IN2P3, BP 28 67037 Strasbourg, France
fDepartment of Physics and Astronomy, 104 Overmann Hall, Bowling Green State University, OH, 43403, USA
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We discuss some aspects important for interpretation of the Ps formation process in liquids and molecular media: (1) inhomogeneity of intratrack reactions and parameters of the e+ track, (2) final states of e+, its solvation in polar and nonpolar liquids, relation to e+ mobility, (3) quasi-neutrality of the e+ blob and its ambipolar outdiffusion, (4) appearance of the "in-blob" and "out-of-the-blob" positron fractions, and (5) electric field effect on Ps formation.

DOI: 10.12693/APhysPolA.132.1461
topics: positron, positronium, annihilation, ion-electron recombination, solvation, mobility, external electric field, track effects, polar and nonpolar liquids