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24 April 2024

» arxiv » 0801.3193

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Production of Slow Protonium in Vacuum
N.Zurlo ; M.Amoretti ; C.Amsler ; G.Bonomi ; C.Carraro ; C.L.Cesar ; M.Charlton ; M.Doser ; A.Fontana ; R.Funakoshi ; P.Genova ; R.S.Hayano ; L.V.Jorgensen ; A.Kellerbauer ; V.Lagomarsino ; R.Landua ; E.Lodi Rizzini ; M.Macri' ; N.Madsen ; G.Manuzio ; D.Mitchard ; P.Montagna ; L.G.Posada ; H.Pruys ; C.Regenfus ; A.Rotondi ; G.Testera ; D.P.Van der Werf ; A.Variola ; L.Venturelli ; Y.Yamazaki ;
Date:	21 Jan 2008
Abstract:	We describe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion H$_2^+$ in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events in the ATHENA experiment, evidence is presented for protonium production with sub-eV kinetic energies in states around $n$ = 70, with low angular momenta. This work provides a new 2-body system for study using laser spectroscopic techniques.
Source:	arXiv, 0801.3193
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