New Experimental Value for the Orthopositronium Decay Rate
- 20 March 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 40 (12), 737-740
- https://doi.org/10.1103/physrevlett.40.737
Abstract
The vacuum decay rate of orthopositronium formed in a gas is determined, after extrapolation to zero gas density, to be 7.056±0.007 μ. The discovery of two systematic effects in a previous powder experiment is discussed. A new measurement of the decay rate in Si powders yields results in agreement with the new gas value. The experimental values are still in disagreement with the most recent theoretical calculation, 7.0386±0.000 16 μ.
Keywords
This publication has 6 references indexed in Scilit:
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