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The effect of changes in the chemical structure of organic sulfur compounds on their reactivity towards an ortho-positronium (o-Ps) atom was investigated by positron annihilation lifetime spectroscopy in dimethylsulfoxide solutions. S-bridge containing molecules with very similar structural frameworks were selected as model systems, such as, diphenyl sulfide, sulfoxide and sulfone, and their derivatives...
The positron annihilation lifetime spectroscopy (PALS) is used to study the effect of nitroso spin trap scavengers on the positronium (Ps) yields in methanol–water mixed solvents. Nitrosobenzene (NOB), N,N-dimethyl-4-nitroso-aniline (DMNA) and tert-nitroso-butane (tNOBu) are investigated. These compounds have been found to be good Ps inhibitors. The numerical values of the Ps inhibition coefficients...
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