Triplet Ps annihilation parameters in ethanol/c i s-2-pentene/platinum mixtures containing platinum or platinum on charcoal
The Journal of Chemical Physics1990Vol. 92(11), pp. 6581–6586
Abstract
Positron lifetimes and intensities were compared, with and without external mixing, for simulated hydrogenation reaction mixtures consisting of 2/1, 1/1, 0.25/2, 0.5/2, 0.75/2, 1/2, and 1.5/2 ethanol/cis-2-pentene molar ratios to which 0.6 mg platinum powder or 5% platinum on charcoal were added. For platinum mixtures marked quenching of all o-Ps lifetimes and intensities occurred with external mixing. For 1/2 and 1.5/2 platinum-on-charcoal mixtures, the combined o-Ps intensity increased from 66% to 76% and from 30% to 76%, respectively, with external mixing.
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