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Observation of cold, long-lived antiprotonic helium ions
Cold, two-body antiprotonic helium ions p /sup 4/He/sup 2+/ and p /sup 3/He/sup 2+/ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers n/sub i/=28-32 and l/sub i/=n/sub i /-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ult...
| Autores principales: | , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2005
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.94.063401 http://cds.cern.ch/record/908833 |