Papers by Keyword: Ortho-Para Conversion

Abstract: Here we discuss the e⁺ fate from its injection into a liquid till its annihilation, namely: 1) energy losses and track structure of fast positrons. Parameters of the terminal e⁺ blob; 2) electric interaction between blob constituents; 3) picosecond stage: hot (epithermal), quasi-free (dry), solvated (hydrated) e^- and e⁺, capture of hot particles by a scavenger; 4) positronium formation in condensed matter: the Ore model, the diffusion-recombination model, formation of quasi-free Ps and Ps in a bubble, a “non-point” positronium; 5) application of an external magnetic field, mixing of ortho- and para-Ps states, R(H)-parameter, Ps contactdensity; 6) diffusion-controlled reactions involving Ps (oxidation and ortho-para conversion) at nanosecond stage, temperature dependence of the reaction rate constants.