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 silicon-microstrip 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 (100 MeV – 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 100 MeV nucleon−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.
Measurements of He isotopic ratio in cosmic rays in the 100 MeV-1 GeV range with the PAMELA experiment / Casolino, M., De Santis, C., De Simone, N., Formato, V., Nikonov, N., Picozza, P., Adriani, O., Barbarino, G.C., Bazilevskaya, G.A., Bellotti, R., Boezio, M., Bogomolov, E.A., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., et al.. - In: ASTROPHYSICS AND SPACE SCIENCES TRANSACTIONS. - ISSN 1810-6528. - ELETTRONICO. - 7:(2011), pp. 465-469. [10.5194/astra-7-465-2011]
Measurements of He isotopic ratio in cosmic rays in the 100 MeV-1 GeV range with the PAMELA experiment
ADRIANI, OSCAR;BONGI, MASSIMO;
2011
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 silicon-microstrip 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 (100 MeV – 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 100 MeV nucleon−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.
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
