We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment CREAM (Cosmic Ray Energetics And Mass). The instrument (CREAM-II) was comprised of detectors based on different techniques (Cherenkov light, specific ionization in scintillators and silicon sensors) to provide a redundant charge identification and a thin ionization calorimeter capable of measuring the energy of cosmic rays up to several hundreds of TeV. The data analysis is described and the individual energy spectra of C, O, Ne, Mg, Si and Fe are reported up to 1014 eV. The spectral shape looks nearly the same for all the primary elements and can be expressed as a power law in energy E−2.66±0.04. The nitrogen absolute intensity in the energy range 100-800 GeV/n is also measured.

Maestro, P., H. S., A., P., A., Bagliesi, M.G., L., B., J. J., B., et al. (2009). Elemental energy spectra of cosmic rays measured by CREAM-II. In Proc. of 31st ICRC (pp.1-4).

Elemental energy spectra of cosmic rays measured by CREAM-II

MAESTRO, PAOLO;BAGLIESI, MARIA GRAZIA;BIGONGIARI, GABRIELE;MARROCCHESI, PIER SIMONE;ZEI, RICCARDO;
2009-01-01

Abstract

We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment CREAM (Cosmic Ray Energetics And Mass). The instrument (CREAM-II) was comprised of detectors based on different techniques (Cherenkov light, specific ionization in scintillators and silicon sensors) to provide a redundant charge identification and a thin ionization calorimeter capable of measuring the energy of cosmic rays up to several hundreds of TeV. The data analysis is described and the individual energy spectra of C, O, Ne, Mg, Si and Fe are reported up to 1014 eV. The spectral shape looks nearly the same for all the primary elements and can be expressed as a power law in energy E−2.66±0.04. The nitrogen absolute intensity in the energy range 100-800 GeV/n is also measured.
2009
Maestro, P., H. S., A., P., A., Bagliesi, M.G., L., B., J. J., B., et al. (2009). Elemental energy spectra of cosmic rays measured by CREAM-II. In Proc. of 31st ICRC (pp.1-4).
File in questo prodotto:
File Dimensione Formato  
icrc0641.pdf

non disponibili

Tipologia: Post-print
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 88.94 kB
Formato Adobe PDF
88.94 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/31050
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo