Evidence for narrow bound states related to the p system |
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| Authors: | P. Pavlopoulos G. Backenstoss P. Blüm K. Fransson R. Guigas N. Hassler M. Izycki H. Koch A. Nilsson H. Poth M. Suffert L. Tauscher K. Zioutas |
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| Affiliation: | 1. Kernforschungszentrum und Universität Karlsruhe, Institut für Kernphysik, Karlsruhe, Germany;2. Institut für Physik, University of Basel, Basel, Switzerland;3. CERN, Geneva, Switzerland;4. Research Institute for Physics, Stockholm, Sweden;5. Basses Energies, Centre de Recherches Nucléaires, and Université Louis Pasteur, Strasbourg, France |
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| Abstract: | The γ-ray spectrum accompanying the p annihilation at rest has been measured with a large NaI(Tl) spectrometer. Three γ-lines have been observed with energies of 183 ± 7 MeV, 216 ± 9 MeV, and 420 ± 17 MeV at confidence levels of 99.0%, 97.5%, and 98.2%, respectively. The width of the lines corresponds to the detector resolution. |
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