Production of slow protonium in vacuum

We descrbe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion in a nested Penning trap environment. From a careful analysis of the spatial distributions of antiproton annihilation events in the ATHENA e...

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Bibliographic Details
Published in:Hyperfine interactions 2006-09, Vol.172 (1-3), p.97-105
Main Authors: Zurlo, N., Amoretti, M., Amsler, C., Bonomi, G., Carraro, C., Cesar, C. L., Charlton, M., Doser, M., Fontana, A., Funakoshi, R., Genova, P., Hayano, R. S., Jørgensen, L. V., Kellerbauer, A., Lagomarsino, V., Landua, R., Lodi Rizzini, E., Macrì, M., Madsen, N., Manuzio, G., Mitchard, D., Montagna, P., Posada, L. G., Pruys, H., Regenfus, C., Rotondi, A., Testera, G., Van der Werf, D. P., Variola, A., Venturelli, L., Yamazaki, Y.
Format: Article
Language:English
Subjects:
Antiparticles
Antiprotons
Molecular ions
Spatial distribution
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Summary:We descrbe how protonium, the quasi-stable antiproton-proton bound system, has been synthesized following the interaction of antiprotons with the molecular ion 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 two-body system for studies using laser spectroscopic techniques.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-007-9529-0