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- Title
Measurements of He isotopic ratio in cosmic rays in the 100MeV-1 GeV range with the PAMELA experiment.
- Authors
Casolino, M.; De Santis, C.; De Simone, N.; Formato, V.; Nikonov, N.; Picozza, P.
- Abstract
The PAMELA satellite-borne experiment was launched on 15 June 2006 from the Baikonur cosmodrome and it has been collecting data since then. The apparatus comprises a time-of-flight system, a siliconmicrostrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100MeV-1 TeV) with high statistics, with particular focus on the antiparticle component. In this work we present ³He/4He isotopic ratio in the energy range from 100MeVnucleon-1 to ~ 1 GeV nucleon-1. The measured abundances are compared with different interstellar/ heliospheric propagation calculations which are tuned on previous proton and helium measurements.
- Subjects
KAZAKHSTAN; HELIUM isotopes; COSMIC rays; PHYSICS experiments; ARTIFICIAL satellite launching; BAIKONUR (Kazakhstan : Space center); TIME-of-flight mass spectrometry; ELECTROMAGNETIC devices; CALORIMETERS
- Publication
Astrophysics & Space Sciences Transactions (ASTRA), 2011, Vol 7, Issue 4, p465
- ISSN
1810-6528
- Publication type
Article
- DOI
10.5194/astra-7-465-2011