New experimental results for the 17 MeV particle created in $^8Be$

Electron-positron angular correlations were remeasured for the 17.6 MeV $(J^π = 1^+ \to 0^+)$ ground state transition in $^8Be$ using an improved setup compared to the one we used previously. Significant deviations from the internal pair creation was observed at large angles in the angular correlati...

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Detalles Bibliográficos
Autores principales: Krasznahorkay, A J, Csatlós, M, Csige, L, Gulyás, J, Hunyadi, M, Ketel, T J, Krasznahorkay, A, Kuti, I, Nagy, Á, Nyakó, B M, Sas, N, Timár, J, Vajda, I
Lenguaje:eng
Publicado: 2017
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/201713708010
http://cds.cern.ch/record/2275323
Descripción
Sumario:Electron-positron angular correlations were remeasured for the 17.6 MeV $(J^π = 1^+ \to 0^+)$ ground state transition in $^8Be$ using an improved setup compared to the one we used previously. Significant deviations from the internal pair creation was observed at large angles in the angular correlations, which supports that, in an intermediate step, a neutral isoscalar particle with a mass of 17.0 ±0.2(stat) ±0.5(sys) $MeV/c^2$ and $J^π = 1^+$ was created.

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