Electron-positron angular correlations were remeasured for the 17.6 MeV (Jπ = 1+ → 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/c2 and Jπ = 1+ was created.
|Journal||EPJ Web of Conferences|
|Publication status||Published - Apr 12 2017|
|Event||International Symposium Advances in Dark Matter and Particle Physics, ADMPP 2016 - Sicily, Italy|
Duration: Oct 24 2016 → Oct 27 2016
ASJC Scopus subject areas
- Physics and Astronomy(all)