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Positron annihilation in methane gas
- Source :
- Canadian Journal of Physics. 48:2984-2990
- Publication Year :
- 1970
- Publisher :
- Canadian Science Publishing, 1970.
-
Abstract
- The annihilation of positrons in methane gas at room temperature has been measured at pressures below 2 atm. The annihilation rate for the free positron component is proportional to the gas density and corresponds to an effective number of electrons per molecule taking part in annihilation, Zeff = 139.6 ± 1.0 (standard error). The quenching of orthopositronium corresponds to 1Zeff = 0.57 ± 0.07. Resonance annihilation is discussed in a general way.
Details
- ISSN :
- 12086045 and 00084204
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Physics
- Accession number :
- edsair.doi...........86dd215eea16d7e2a14cb3df474bad94