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Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency
- Publication Year :
- 2015
-
Abstract
- We report the first observation of the annihilation of positronium from the 2S state. Positronium (Ps) is excited with a two-photon transition from the 1S to the 2S state where its lifetime is increased by a factor of eight compared to the ground state due to the decrease in the overlap of the positron electron wavefunction. The yield of delayed annihilation photons detected as a function of laser frequency is used as a new method of detecting laser-excited Ps in the 2S state. This can be considered the first step towards a new high precision measurement of the 1S-2S Ps line.<br />Comment: 6 pages, 3 Figures, proceedings EXA 2014, accepted for publication in Hyperfine Interactions
- Subjects :
- Physics - Atomic Physics
High Energy Physics - Experiment
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1503.05755
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1007/s10751-015-1158-4