Production of 2S13 positronium atoms by single-photon excitation in an electric field

A. M. Alonso, S. D. Hogan, and D. B. Cassidy
Phys. Rev. A 95, 033408 – Published 9 March 2017

Abstract

We report experiments in which positronium (Ps) atoms are produced in the 2S13 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 2S13 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.

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  • Received 26 January 2017

DOI:https://doi.org/10.1103/PhysRevA.95.033408

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

A. M. Alonso, S. D. Hogan, and D. B. Cassidy

  • Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom

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Issue

Vol. 95, Iss. 3 — March 2017

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