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Precision Microwave Spectroscopy of the Positronium 2 ³S₁ → 2 ³P₂ Interval

Cassidy, David; (2023) Precision Microwave Spectroscopy of the Positronium 2 ³S₁ → 2 ³P₂ Interval. Physical Review Letters , 131 (4) , Article 043001. 10.1103/PhysRevLett.131.043001. Green open access

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Abstract

We report the results of a new measurement of the positronium Precision Microwave Spectroscopy of the Positronium 2 ³S₁ → 2 ³P₂ (v₂) interval. Using a modified experimental arrangement we have significantly reduced the effects of microwave reflections, which in previous experiments resulted in shifts and asymmetric line shapes. With the improved apparatus we obtain an experimental value of v₂ = 8627.94 ± 0.95 MHz, which is within 1.3[sigma] of the theoretical value 8626.71 ± 0.08 MHz.

Type: Article
Title: Precision Microwave Spectroscopy of the Positronium 2 ³S₁ → 2 ³P₂ Interval
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.131.043001
Publisher version: https://doi.org/10.1103/PhysRevLett.131.043001
Language: English
Additional information: © 2023 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10174525
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