Measurement of the cosmic ray hadron spectrum up to 30 TeV at mountain altitude: the primary proton spectrum

作者：Aglietta M; Alessandro B; Antonioli P; Arneodo F; Bergamasco L; Bertaina M; Castagnoli C; Castellina A^*; Chiavassa A; Castagnoli GC; Piazzoli BD; Di Sciascio G; Fulgione W; Galeotti P; Ghia PL; Iacovacci M; Mannocchi G; Morello C; Navarra G; Riccati L; Saavedra O; Trinchero GC; Valchierotti S; Vallania P; Vernetto S; Vigorito C

来源：Astroparticle Physics, 2003, 19(3): 329-338.

DOI：10.1016/S0927-6505(03)00103-8

• cosmic rays
• hadrons
• primary protons
• high energy calorimetry

The flux of cosmic ray hadrons at the atmospheric depth of 820 g cm(-2) has been measured by means of the EASTOP hadron calorimeter (Campo Imperatore, National Gran Sasso Laboratories, 2005 m a.s.l.). The hadron spectrum is well described by a single power law:
S-h(E-h) = (2.25 +/- 0.21 +/- 0.34(sys)) x 10(-7)
[GRAPHICS]
m(-2)s(-1)sr(-1)GeV(-1)
over the energy range 30 GeV-30 TeV. The procedure and the accuracy of the measurement are discussed.
The primary proton spectrum is derived from the data by using the CORSIKA/QGSJET code to compute the local hadron flux as a function of the primary proton spectrum and to calculate and subtract the heavy nuclei contribution (basing on direct measurements). Over a wide energy range E-0 = 0.5-50 TeV its best fit is given by a single power law:
S(E-0) = (9.81 +/- 1.1 +/- 1.6(sys)) x 10(-5)
[GRAPHICS]
m(-2)s(-1)sr(-1)GeV(-1).

• 出版日期2003-6