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Laser spectroscopy of pionic helium atoms
Long-lived pionic helium atoms (composed of a helium-4 nucleus, an electron and a negatively charged pion) are synthesized in a superfluid-helium target, as confirmed by laser spectroscopy involving the pion-occupied orbitals.
| Autores principales: | , , , , |
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| Lenguaje: | eng |
| Publicado: |
2020
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| Acceso en línea: | https://dx.doi.org/10.1038/s41586-020-2240-x http://cds.cern.ch/record/2719093 |