Title of article
The cosmic-ray proton and helium spectra measured with the CAPRICE98 balloon experiment
Author/Authors
Boezio، نويسنده , , M. and Bonvicini، نويسنده , , V. and Schiavon، نويسنده , , P. and Vacchi، نويسنده , , A. and Zampa، نويسنده , , N. and Bergstrِm، نويسنده , , D. A. Carlson، نويسنده , , P. and Francke، نويسنده , , T. and Hansen، نويسنده , , P. and Mocchiutti، نويسنده , , E. and Suffert، نويسنده , , M. and Hof، نويسنده , , M. J. Kremer، نويسنده , , J. and Menn، نويسنده , , W. and Simon، نويسنده , , M. and Ambriola، نويسنده , , M. and Bellotti، نويسنده , , R. and Cafagna، نويسنده , , F. and Ciacio، نويسنده , , F. and Circella، نويسنده , , M. and De Marzo، نويسنده , , C.N. and Finetti، نويسنده , , N. and Papini، نويسنده , , P. and Piccardi، نويسنده , , S. and Spillantini، نويسنده , , P. and Vannuccini، نويسنده , , E. and Bartalucci، نويسنده , , S. and Ricci، نويسنده , , M. and Casolino، نويسنده , , M. and De Pascale، نويسنده , , M.P. and Morselli، نويسنده , , A. and Picozza، نويسنده , , P. and Sparvoli، نويسنده , , R. and Mitchell، نويسنده , , J.W. and Ormes، نويسنده , , J.F. and Stephens، نويسنده , , S.A. and Streitmatter، نويسنده , , R.E. and Bravar، نويسنده , , U. and Stochaj، نويسنده , , S.J.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
22
From page
583
To page
604
Abstract
A new measurement of the primary cosmic-ray proton and helium fluxes from 3 to 350 GeV was carried out by the balloon-borne CAPRICE experiment in 1998. This experimental setup combines different detector techniques and has excellent particle discrimination capabilities allowing clear particle identification. Our experiment has the capability to determine accurately detector selection efficiencies and systematic errors associated with them. Furthermore, it can check for the first time the energy determined by the magnet spectrometer by using the Cherenkov angle measured by the RICH detector well above 20 GeV n−1. The analysis of the primary proton and helium components is described here and the results are compared with other recent measurements using other magnet spectrometers. The observed energy spectra at the top of the atmosphere can be represented by (1.27±0.09)×104 E−2.75±0.02 particles (m2 GeV sr s)−1, where E is the kinetic energy in GeV, for protons between 20 and 350 GeV and (4.8±0.8)×102 E−2.67±0.03 particles (m2 GeV n−1 sr s)−1, where E is the kinetic energy in GeV per nucleon, for helium nuclei between 15 and 150 GeV n−1.
Keywords
elementary particles , RICH detectors , Balloons , Cosmic rays
Journal title
Astroparticle Physics
Serial Year
2003
Journal title
Astroparticle Physics
Record number
1328995
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