## Positron Annihilation Study in Ca2+ and Sr2+ -Doped KCI? Positron lifetime and three photon annihilation measurements are reported in KCI : Ca2 + and KCI: Sr2+. The present results clearly demonstrate that the positron essentially depends on the kind of Me2+ and impurity concentration in these
Positron lifetime studies in pure and chromium intercalated 2HNbSe2
β Scribed by S. R. Dhanalakshmi; T. Nagarajan; S. Ramasamy; R. N. Viswanath; A. Manivannan; G. V. Subba Rao
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 293 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0232-1300
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π SIMILAR VOLUMES
The temperature dependence of positron annihilation in copper and a 0.3 at. "/b AgSb alloy has been investigated by measuring the positron lifetime. I n both cases the vacancy lifetime is nearly independent on temperature while the bulk lifetime shows a rapid increase after the onset of detectable v
Positron lifetime spectroscopy has been applied to study the temperature dependence of free-volume properties in a solvent-free polymer-salt complex polyethylene oxide (PEO) doped with ammonium iodide (NH 4 I, with NH / 4 /EO Γ 0.076) in the temperature range of 298-353 K. The observed lifetime spec
## Abstract Summary:The microstructure of the free volume and its temperature dependence in two poly(dimethyl siloxane)s (PDMS), one in the pure state and the other filled with 35 wt.β% of an in situ hydrophobized fumed silica with a specific surface area of 200β300 m^2^βΒ·βg^β1^, were studied by pr