Measurement of positron lifetime to probe the mixed molecular states of liquid water

Physics – Condensed Matter – Other Condensed Matter

Scientific paper

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11 pages, 6 pages

Scientific paper

10.1016/j.physleta.2005.07.018

Positron lifetime spectra were measured in liquid water at temperatures between 0c and 50c. The long lifetime of ortho-positronium atoms (o-Ps) determined by electron pick-off in molecular substances decreases smoothly by 10% as the temperature is raised. This lifetime temperature dependence can be explained by combining the Ps-bubble model and the mixture state model of liquid water.

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