Gurung, L;
Babij, TJ;
Hogan, SD;
Cassidy, DB;
(2020)
Precision Microwave Spectroscopy of the Positronium n=2 Fine Structure.
Physical Review Letters
, 125
(7)
, Article 073002. 10.1103/physrevlett.125.073002.
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Abstract
We report a new measurement of the positronium (Ps) 2 3 S 1 → 2 3 P 0 interval. Slow Ps atoms, optically excited to the radiatively metastable 2 3 S 1 level, flew through a microwave radiation field tuned to drive the transition to the short-lived 2 3 P 0 level, which was detected via the time spectrum of subsequent ground state Ps annihilation radiation. After accounting for Zeeman shifts we obtain a transition frequency ν 0 = 18 501.02 ± 0.61 MHz , which is not in agreement with the theoretical value of ν 0 = 18 498.25 ± 0.08 MHz .
| Type: | Article |
|---|---|
| Title: | Precision Microwave Spectroscopy of the Positronium n=2 Fine Structure |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.125.073002 |
| Publisher version: | https://doi.org/10.1103/physrevlett.125.073002 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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-pp.ucl.ac.uk/id/eprint/10107934 |
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