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Title: Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas

Journal Article · · Journal of Cosmology and Astroparticle Physics
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6]
  1. Gran Sasso Science Inst. and National Inst. of Nuclear Physics (INFN), L'Aquila (Italy). Gran Sasso National Lab. (INFN-LNGS)
  2. Univ. of Amsterdam (Netherlands). Inst. of Physics and Gravitation & Astroparticle Physics Amsterdam (GRAPPA)
  3. Technical Univ. Munchen, Garching (Germany). Dept. of Physics; RWTH Aachen Univ. (Germany). Inst. for Theoretical Particle Physics and Cosmology (TTK)
  4. SLAC National Accelerator Lab. and Stanford Univ., Stanford, CA (United States). W.W. Hansen Experimental Physics Lab., Kavli Inst. for Particle Astrophysics and Cosmology and Dept. of Physics
  5. National Inst. of Nuclear Physics (INFN), Pisa (Italy)
  6. National Inst. of Nuclear Physics (INFN), Bari (Italy)

Understanding the isotopic composition of cosmic rays (CRs) observed near Earth represents a milestone towards the identification of their origin. Local fluxes contain all the known stable and long-lived isotopes, reflecting the complex history of primaries and secondaries as they traverse the interstellar medium. For that reason, a numerical code which aims at describing the CR transport in the Galaxy must unavoidably rely on accurate modelling of the production of secondary particles. Here, we provide a detailed description of the nuclear cross sections and decay network as implemented in the forthcoming release of the galactic propagation code DRAGON2. We present the secondary production models implemented in the code and we apply the different prescriptions to compute quantities of interest to interpret local CR fluxes (e.g., nuclear fragmentation timescales, secondary and tertiary source terms). In particular, we develop a nuclear secondary production model aimed at accurately computing the light secondary fluxes (namely: Li, Be, B) above 1 GeV/n. This result is achieved by fitting existing empirical or semi-empirical formalisms to a large sample of measurements in the energy range 100 MeV/n to 100 GeV/n and by considering the contribution of the most relevant decaying isotopes up to iron. Concerning secondary antiparticles (positrons and antiprotons), we describe a collection of models taken from the literature, and provide a detailed quantitative comparison.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; European Commission (EC); German-Israeli Foundation for Scientific Research and Development (GIF); National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AC02-76SF00515; 751311; 81303
OSTI ID:
1461832
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 07; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Secondary antiprotons as a Galactic Dark Matter probe text January 2015
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Cosmic Ray Antiprotons at High Energies text January 2017
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Cited By (7)

Positron Scattering: Total Elastic and Grand Total Cross Sections for Molecules of Astrophysical Importance journal April 2019
Effects of re-acceleration and source grammage on secondary cosmic rays spectra journal July 2019
AMS-02 beryllium data and its implication for cosmic ray transport journal January 2020
Scrutinizing the evidence for dark matter in cosmic-ray antiprotons journal May 2019
Galactic cosmic rays after the AMS-02 observations journal May 2019
Scrutinizing the evidence for dark matter in cosmic-ray antiprotons text January 2019
Impact of Cosmic-Ray Physics on Dark Matter Indirect Searches journal December 2018


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