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Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange

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Title: Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange
Authors: McConnell, R
Gabrielse, G
Kolthammer, WS
Richerme, P
Muellers, A
Walz, J
Grzonka, D
Zielinski, M
Fitzakerley, D
George, MC
Hessels, EA
Storry, CH
Weel, M
Item Type: Journal Article
Abstract: Lasers are used to control the production of highly excited positronium atoms (Ps*). The laser light excites Cs atoms to Rydberg states that have a large cross section for resonant charge-exchange collisions with cold trapped positrons. For each trial with 30 million trapped positrons, more than 700 000 of the created Ps* have trajectories near the axis of the apparatus, and are detected using Stark ionization. This number of Ps* is 500 times higher than realized in an earlier proof-of-principle demonstration (2004 Phys. Lett. B 597 257). A second charge exchange of these near-axis Ps* with trapped antiprotons could be used to produce cold antihydrogen, and this antihydrogen production is expected to be increased by a similar factor.
Issue Date: 23-Feb-2016
Date of Acceptance: 4-Jan-2016
URI: http://hdl.handle.net/10044/1/57908
DOI: https://dx.doi.org/10.1088/0953-4075/49/6/064002
ISSN: 0953-4075
Publisher: IOP PUBLISHING LTD
Journal / Book Title: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume: 49
Issue: 6
Copyright Statement: © 2016 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Journal of Physics B: Atomic, Molecular and Optical Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at https://dx.doi.org/10.1088/0953-4075/49/6/064002
Keywords: Science & Technology
Physical Sciences
Optics
Physics, Atomic, Molecular & Chemical
Physics
positronium
charge-exchange
Rydberg states
positrons
ANTIHYDROGEN
CONFINEMENT
PLASMAS
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
0205 Optical Physics
0307 Theoretical And Computational Chemistry
General Physics
Publication Status: Published
Article Number: ARTN 064002
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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