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Positron annihilation in high molecular weight compounds

✍ Scribed by T. Suzuki; Y. Ito; K. Endo; S. Fujita; Y. Masuda; T. Egusa

Publisher
Elsevier Science
Year
1988
Weight
418 KB
Volume
39
Category
Article
ISSN
0883-2889

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✦ Synopsis

Positron

lifetime measurement has been applied to high molecular weight compounds--epoxy resin, polyvinylidene fluoride, and polyethylene-which are commonly used in the field of electrical engineering. The effect of radicals produced in these samples by y-ray irradiation on ortho-positronium formation is discussed. It has been shown that the composition of epoxy resin affects positronium formation. Some electric characteristics are compared with the results of positron annihilation.

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Molecular model for annihilation rates i
Molecular model for annihilation rates in positron complexes
✍ Denise AssafrΓ£o; H.R. James Walters; JosΓ© R. Mohallem πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 285 KB

The molecular approach for positron interaction with atoms is developed further. Potential energy curves for positron motion are obtained. Two procedures accounting for the nonadiabatic effective positron mass are introduced for calculating annihilation rate constants. The first one takes the bound-