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Title: Measurement of boron and carbon fluxes in cosmic rays with the PAMELA experiment

The propagation of cosmic rays inside our galaxy plays a fundamental role in shaping their injection spectra into those observed at Earth. One of the best tools to investigate this issue is the ratio of fluxes for secondary and primary species. The boron-to-carbon (B/C) ratio, in particular, is a sensitive probe to investigate propagation mechanisms. This paper presents new measurements of the absolute fluxes of boron and carbon nuclei as well as the B/C ratio from the PAMELA space experiment. The results span the range 0.44-129 GeV/n in kinetic energy for data taken in the period 2006 July to 2008 March.
Authors:
;  [1] ;  [2] ;  [3] ; ;  [4] ; ; ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ; ; ; ;  [11] ;  [12] ;  [13] more »; « less
  1. Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Florence (Italy)
  2. Department of Physics, University of Naples "Federico II," I-80126 Naples (Italy)
  3. Lebedev Physical Institute, RU-119991 Moscow (Russian Federation)
  4. Department of Physics, University of Bari, I-70126 Bari (Italy)
  5. INFN, Sezione di Trieste, I-34149 Trieste (Italy)
  6. Ioffe Physical Technical Institute, RU-194021 St. Petersburg (Russian Federation)
  7. INFN, Sezione di Florence, I-50019 Sesto Fiorentino, Florence (Italy)
  8. INFN, Sezione di Bari, I-70126 Bari (Italy)
  9. INFN, Sezione di Naples, I-80126 Naples (Italy)
  10. KTH, Department of Physics, and the Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, SE-10691 Stockholm (Sweden)
  11. INFN, Sezione di Rome "Tor Vergata," I-00133 Rome (Italy)
  12. IFAC, I-50019 Sesto Fiorentino, Florence (Italy)
  13. National Research Nuclear University MEPhI, RU-115409 Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
22365323
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 791; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BORON; CARBON; CONCENTRATION RATIO; COSMIC RADIATION; COSMIC RAY PROPAGATION; GALAXIES; GALAXY NUCLEI; GEV RANGE; INJECTION; KINETIC ENERGY; SPACE; SPECTRA