21 research outputs found
Measurement of positron lifetime to probe the mixed molecular states of liquid water
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.Comment: 11 pages, 6 page