Positronium Lifetime Studies in Aqueous SDS Micellar Solutions

摘要

Positronium lifetime measurements were performed in aqueous SDS (sodium dodecyl sulphate) solutions at different temperatures. The o-Ps (ortho-positronium) lifetime shows monotonous increase vs. surfactant concentration and temperature. Results are explained by a simple model based on o-Ps diffusion and on the residence probability of o-Ps atoms in micelles; a lower boundary for o-Ps diffusion coefficient in the solvent was estimated. (Atomindex citation 14:759479)