Paolo Montini (INFN - Sezione di Roma TRE)
The ARGO-YBJ experiment is a full-coverage air shower detector operating at the Yangbajing International Cosmic Ray Observatory (Tibet, P.R China, 4300 m a.s.l.). The detector was in stable data taking in its full configuration from Nov. 2007 to Dec 2012. More than 10^11 events have been collected and reconstructed. Due to its characteristics (full-coverage, high segmentation,high altitude operation) the ARGO-YBJ experiment is able to investigate the cosmic ray energy spectrum in a wide energy range. In this work we present the measurement of the Proton and Helium spectra in the energy range 1-300 TeV by using a large data sample collected between Jan. 2008 and Dec. 2011.
ARGO-YBJ Collaboration (Yangbajing Cosmic Ray Laboratory)