INVESTIGADORES
HANSEN Patricia Maria
artículos
Título:
The Cosmic-Ray Proton and Helium Spectra measured with the CAPRICE98 balloon experiment
Autor/es:
THE CAPRICE98 COLLABORATION (P. HANSEN PERTENECIA A DICHA COLABORACION)
Revista:
ASTROPARTICLE PHYSICS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2003 vol. 19 p. 583 - 588
ISSN:
0927-6505
Resumen:
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. 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)x10^4 E^(-2.75+-0.02) particles (m^2
GeV sr s)^-1, where E is the kinetic energy, for protons between 20
and 350 GeV and (4.8+-0.8)x10^2 E^(-2.67+-0.06) particles (m^2 GeV
nucleon^-1 sr s)^-1, where E is the kinetic energy per nucleon, for
helium nuclei between 15 and 150 GeV nucleon^-1.