Universe (Apr 2024)

Checking the <sup>8</sup>Be Anomaly with a Two-Arm Electron Positron Pair Spectrometer

  • Tran The Anh,
  • Tran Dinh Trong,
  • Attila J. Krasznahorkay,
  • Attila Krasznahorkay,
  • József Molnár,
  • Zoltán Pintye,
  • Nguyen Ai Viet,
  • Nguyen The Nghia,
  • Do Thi Khanh Linh,
  • Bui Thi Hoa,
  • Le Xuan Chung,
  • Nguyen Tuan Anh

DOI
https://doi.org/10.3390/universe10040168
Journal volume & issue
Vol. 10, no. 4
p. 168

Abstract

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We have repeated the experiment performed recently by ATOMKI Laboratory (Debrecen, Hungary), which may indicate a new particle called X17 in the literature. In order to obtain a reliable and independent result, we used a different structure of the electron–positron pair spectrometer at the VNU University of Science. The spectrometer has two arms and simpler acceptance and efficiency as a function of the correlation angle, but the other conditions of the experiment were very similar to the published ones. We could confirm the presence of the anomaly measured at Ep = 1225 keV, which is above the Ep = 1040 keV resonance.

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