Measurement of positron lifetime to probe the mixed molecular states of liquid water
classification
❄️ cond-mat.other
keywords
lifetimeliquidwatermodelmolecularpositrontemperatureatoms
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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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