A cosmic-ray database update: CRDB v4.1

Maurin, David; Ahlers, Markus; Dembinski, Hans; Haungs, Andreas; Mangeard, Pierre-Simon; Melot, Frédéric; Mertsch, Philipp; Wochele, Doris; Wochele, Jürgen

doi:10.1140/epjc/s10052-023-12092-8

Cited by 5 publications

(1 citation statement)

References 138 publications

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“…Using a calorimetric approach, SOKOL instead claimed a measurement of D/He in the TeV energy range, suggesting a surprisingly high D abundance. A high-precision measurement at an energy higher than a few GeV/nucleon is still missing [14] and could shed light on the origin hypotheses for D.…”

Section: Introductionmentioning

confidence: 99%

A Multiple Scattering-Based Technique for Isotopic Identification in Cosmic Rays

Dimiccoli,

Follega

2024

Particles

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Analyzing the isotopic composition of cosmic rays (CRs) provides valuable insights into the galactic environment and helps refine existing propagation models. A particular interest is devoted to secondary-to-primary ratios of light isotopic components of CRs, the measurement of which can provide complementary information with respect to secondary-to-primary ratios like B/C. Given the complexity of the concurrent measurement of velocity and momentum required to differentiate isotopes of the same Z, a task typically accomplished using magnetic spectrometers, existing measurements of these ratios only effectively characterize the low-energy region (below 1 GeV/nucl). This study introduces a novel technique for isotopic distinction in CRs at high energies up to 100 GeV/nucl based on multiple scattering, which, combined with the proposed measurement of velocity, represent an interesting alternative to magnetic spectrometers. The performance of this technique was assessed through a dedicated simulation using the GEANT4 package, with specific emphasis on Z = 1 isotopes.

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Section: Introductionmentioning

confidence: 99%

A Multiple Scattering-Based Technique for Isotopic Identification in Cosmic Rays

Dimiccoli,

Follega

2024

Particles

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Secondary cosmic-ray nuclei in the Galactic halo model with nonlinear Landau damping

Chernyshov,

Ivlev,

Dogiel

2024

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We employed our recent model of the cosmic-ray (CR) halo to compute the Galactic spectra of stable and unstable secondary nuclei. In this model, confinement of the Galactic CRs is entirely determined by the self-generated Alfv\'enic turbulence whose spectrum is controlled by nonlinear Landau damping. We analyzed the physical parameters affecting propagation characteristics of CRs and estimated the best set of free parameters providing accurate description of available observational data. We also show that agreement with observations at lower energies may be further improved by taking into account the effect of ion-neutral damping that operates near the Galactic disk.

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Origin of the spectral features observed in the cosmic-ray spectrum

Recchia,

Gabici

2024

A&A

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Recent measurements reveal the presence of several features in the cosmic-ray (CR) spectrum. In particular, the proton and helium spectra exhibit a spectral hardening at $ GV $ and a spectral steepening at $ TV $, followed by the well-known knee-like feature at $ PV $. The spectra of heavier nuclei also harden at $ GV $, while no claim can be currently made about the presence of the $ TV $ softening, due to low statistics. In addition, the B/C ratio also exhibits a hardening at $ GeV/n $ and seems to be rather shallow at $ TeV/n We propose a possible explanation of the observed spectral features in the framework of a composite diffusion scenario and considering different classes of sources. The proposed scenario is based on two assumptions. First, in the Galactic disk, where magnetic field lines are mainly oriented along the Galactic plane, particle scattering is assumed to be very inefficient. Therefore, the transport of CRs from the disk to the halo is set by the magnetic field line random walk induced by large-scale turbulence. Second, we propose that the spectral steepening at $ TV $ is related to the typical maximum rigidity reached in the acceleration of CRs by the majority of supernova remnants, while we assume that only a fraction of sources, contributing to $ 10-20<!PCT!> $ of the CR population, can accelerate particles up to sim PV rigidities. Within this framework we show that it is possible to reproduce the proton and helium spectra from GV to multi-PV; the $p$/He ratio; the spectra of CRs from lithium to iron; the $ p $ flux and the $ p /p$ ratio; and the abundance ratios B/C, B/O, C/O, Be/C, Be/O, and Be/B. We also discuss the Be Be ratio in view of the recent AMS02 preliminary measurements.

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A cosmic-ray database update: CRDB v4.1

Cited by 5 publications

References 138 publications

A Multiple Scattering-Based Technique for Isotopic Identification in Cosmic Rays

A Multiple Scattering-Based Technique for Isotopic Identification in Cosmic Rays

Secondary cosmic-ray nuclei in the Galactic halo model with nonlinear Landau damping

Origin of the spectral features observed in the cosmic-ray spectrum

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