%0 Journal Article %J Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment %D 2016 %T Direct detection of antihydrogen atoms using a BGO crystal %A Y. Nagata %A N. Kuroda %A M. Ohtsuka %A M. Leali %A E. Lodi-Rizzini %A V. Mascagna %A M. Tajima %A H.A. Torii %A N. Zurlo %A Y. Matsuda %A L. Venturelli %A Y. Yamazaki %K Antihydrogen %K antimatter %K Cosmic ray background suppression %K Detector %K Inorganic scintillator %X

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.

%B Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment %V 840 %P 153 - 159 %G eng %U http://www.sciencedirect.com/science/article/pii/S0168900216310440 %R http://dx.doi.org/10.1016/j.nima.2016.10.019