The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured below the so-called knee by using a hybrid experiment with a wide field-of-view Cherenkov telescope and the Resistive Plate Chamber (RPC) array of the ARGO-YBJ experiment at 4300 m above sea level. The Hydrogen and Helium nuclei have been well separated from other cosmic ray components by using a multi-parameter technique. A highly uniform energy resolution of about 25% is achieved throughout the whole energy range (100-700 TeV). The observed energy spectrum is compatible with a single power law with index gamma = -2.63 +- 0.06.
B. Bartoli, BERNARDINI, P., X. J. Bi, I. Bolognino, P. Branchini, A. Budano, et al. (2014). Energy spectrum of cosmic protons and helium nuclei by a hybrid measurement at 4300 m a.s.l. CHINESE PHYSICS C, 38, 045001-1-045001-7 [10.1088/1674-1137/38/4/045001].
Energy spectrum of cosmic protons and helium nuclei by a hybrid measurement at 4300 m a.s.l
MARSELLA, GIOVANNI;
2014-01-01
Abstract
The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured below the so-called knee by using a hybrid experiment with a wide field-of-view Cherenkov telescope and the Resistive Plate Chamber (RPC) array of the ARGO-YBJ experiment at 4300 m above sea level. The Hydrogen and Helium nuclei have been well separated from other cosmic ray components by using a multi-parameter technique. A highly uniform energy resolution of about 25% is achieved throughout the whole energy range (100-700 TeV). The observed energy spectrum is compatible with a single power law with index gamma = -2.63 +- 0.06.
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