Alonso, AM;
Hogan, SD;
Cassidy, DB;
(2017)
Production of 2(3) S-1 positronium atoms by single-photon excitation in an electric field.
Physical Review A
, 95
(3)
, Article 033408. 10.1103/PhysRevA.95.033408.
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Abstract
We report experiments in which positronium (Ps) atoms are produced in the 2 3 S1 level by single-photon excitation from the ground state. To accomplish this, Stark-mixed n = 2 states were optically excited in electric fields. By adiabatically switching off the electric field after laser excitation, some of the mixed states evolved into pure 2 3 S1 levels, whose presence was detected via the time dependence of their annihilation γ radiation. The observed ≈4% production efficiency relative to that of Rydberg Ps states is consistent with a Monte Carlo simulation that takes into account the rate at which the electric fields were switched off.
| Type: | Article |
|---|---|
| Title: | Production of 2(3) S-1 positronium atoms by single-photon excitation in an electric field |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevA.95.033408 |
| Publisher version: | http://doi.org/10.1103/PhysRevA.95.033408 |
| Language: | English |
| Additional information: | ©2017 American Physical Society. This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Optics, Physics, Atomic, Molecular & Chemical, Physics, EXCITED-STATE POSITRONIUM, ORTHOPOSITRONIUM DECAY-RATE, WAVE 2-PHOTON EXCITATION, ANNIHILATION LIFETIME, PRECISION-MEASUREMENT, METAL-SURFACES, INTERVAL, SPECTROSCOPY, TRANSITIONS, HYDROGEN |
| 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/1550669 |
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