Positron lifetime parameters in H2, CO2and CH4
- 14 November 1983
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 16 (21) , 4065-4088
- https://doi.org/10.1088/0022-3700/16/21/027
Abstract
Free positron and ortho-positronium lifetimes have been measured, along with the positronium formation fractions, for the three molecular gases H2, CO2 and CH4 in the intermediate density range. The measurements are compared with other existing data where possible and significant discrepancies between earlier results and those presented have been found. The complex behaviour observed for all three parameters has been discussed in terms of current models where applicable.Keywords
This publication has 43 references indexed in Scilit:
- On the theoretical and experimental cross sections for low-energy positron-rare-gas scatteringJournal of Physics B: Atomic and Molecular Physics, 1981
- The energy dependence of positronium formation in gasesJournal of Physics B: Atomic and Molecular Physics, 1980
- corrections in positronium: Hyperfine splitting and decay ratePhysical Review A, 1979
- Diffusion of positrons in helium gasJournal of Physics B: Atomic and Molecular Physics, 1977
- The scattering of p-wave positrons by heliumJournal of Physics B: Atomic and Molecular Physics, 1975
- Positron annihilation in low-temperature rare gases. I. HeliumPhysical Review A, 1975
- Positronium formation in the noble gasesJournal of Physics B: Atomic and Molecular Physics, 1975
- Elastic Scattering and Rotational Excitation of Molecular Hydrogen by Low Energy PositronsCanadian Journal of Physics, 1974
- A simple positron lifetime system suitable for low density gasesApplied Physics A, 1974
- Density dependence of the electron drift velocity in argonPhysics Letters A, 1973