On the creation of the 17 MeV X boson in the 17.6 MeV M1 transition of $^8Be$

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 one we used previously. Significant deviations from the internal pair creation was observed at large angles in the angular correlations,...

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Detalles Bibliográficos
Autores principales: Krasznahorkay, A J, Csatlós, M, Csige, L, Gulyás, J, Ketel, T J, Krasznahorkay, A, Kuti, I, Nagy, Á, Nyakó, B M, Sas, N, Timár, J
Lenguaje:eng
Publicado: 2017
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/201714201019
http://cds.cern.ch/record/2275461
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 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±0.5 (stat)±0.5 (sys) $MeV/c^2$ and $J^π = 1^+$ was created.

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