Direct detection of antihydrogen atoms using a BGO crystal

Y. Nagata, N. Kuroda*, M. Ohtsuka, M. Leali, E. Lodi-Rizzini, V. Mascagna, M. Tajima, H. A. Torii, N. Zurlo, Y. Matsuda, L. Venturelli, Y. Yamazaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The ASACUSA collaboration has developed a detector consisting of a large size BGO crystal to detect an atomic antihydrogen beam, and performed the direct detection of antihydrogen atoms. Energy spectra from antihydrogen annihilation on the BGO crystal are discussed in comparison to simulation results from the GEANT4 toolkit. Background mainly originating from cosmic rays were strongly suppressed by analyzing the energy deposited in the BGO and requiring a multiplicity of charged pions. Thus antihydrogen events were identified.

Original languageEnglish
Pages (from-to)153-159
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2016 Dec 21
Externally publishedYes


  • Antihydrogen
  • Antimatter
  • Cosmic ray background suppression
  • Detector
  • Inorganic scintillator

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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