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- Marcelli, N.Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy.;INFN, Sez Rome Tor Vergata, I-00133 Rome, Italy. (author)
Time Dependence of the Flux of Helium Nuclei in Cosmic Rays Measured by the PAMELA Experiment between 2006 July and 2009 December
- Article/chapterEnglish2020
Publisher, publication year, extent ...
- 2020-04-24
- IOP PUBLISHING LTD,2020
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- LIBRIS-ID:oai:DiVA.org:kth-273509
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-273509URI
- https://doi.org/10.3847/1538-4357/ab80c2DOI
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- Language:English
- Summary in:English
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- QC 20200525
- Precise time-dependent measurements of the Z = 2 component in the cosmic radiation provide crucial information about the propagation of charged particles through the heliosphere. The PAMELA experiment, with its long flight duration (2006 June 15-2016 January 23) and the low energy threshold (80 MeV/n) is an ideal detector for cosmic-ray solar modulation studies. In this paper, the helium nuclei spectra measured by the PAMELA instrument from 2006 July to 2009 December over a Carrington rotation time basis are presented. A state-of-the-art three-dimensional model for cosmic-ray propagation inside the heliosphere was used to interpret the time-dependent measured fluxes. Proton-to-helium flux ratio time profiles at various rigidities are also presented in order to study any features that could result from the different masses and local interstellar spectra shapes.
Subject headings and genre
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- Cosmic ray detectors
- Galactic cosmic rays
- Heliosphere
Added entries (persons, corporate bodies, meetings, titles ...)
- Munini, R.INFN, Sez Trieste, I-34149 Trieste, Italy.;IFPU, I-34014 Trieste, Italy. (author)
- Carlson, PerKTH,Partikel- och astropartikelfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.(Swepub:kth)u1ua4u32 (author)
- Pearce, Mark,1970-KTH,Partikel- och astropartikelfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.(Swepub:kth)u17jptna (author)
- Zampa, N.INFN, Sez Trieste, I-34149 Trieste, Italy. (author)
- Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy.;INFN, Sez Rome Tor Vergata, I-00133 Rome, Italy.INFN, Sez Trieste, I-34149 Trieste, Italy.;IFPU, I-34014 Trieste, Italy. (creator_code:org_t)
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- In:Astrophysical Journal: IOP PUBLISHING LTD893:20004-637X1538-4357
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