Direct detection of antihydrogen atoms using a BGO crystal

TitleDirect detection of antihydrogen atoms using a BGO crystal
Publication TypeJournal Article
Year of Publication2016
AuthorsNagata, Y, Kuroda, N, Ohtsuka, M, Leali, M, Lodi-Rizzini, E, Mascagna, V, Tajima, M, Tor, ii, HA, Zurlo, N, Matsuda, Y, Venturelli, L, Yamazaki, Y
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Pagination153 - 159
KeywordsAntihydrogen, antimatter, Cosmic ray background suppression, Detector, Inorganic scintillator

Abstract 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.