M. Martucci

Cosmic-Ray Positron Energy Spectrum measured by PAMELA

Precision measurements of the positron component in the cosmic radiation provide important information about the propagation of cosmic rays and the nature of particle sources in our Galaxy. The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray positron flux and fraction that extends previously published measurements up to 300 GeV in kinetic energy. The combined measurements of the cosmic-ray positron energy spectrum and fraction provide a unique tool to constrain interpretation models. During the recent solar minimum activity period from July 2006 to December 2009, approximately 24,500 positrons were observed. The results cannot be easily reconciled with purely secondary production, and additional sources of either astrophysical or exotic origin may be required.

Measurement of Boron and Carbon Fluxes in Cosmic Rays with the Pamela Experiment

The propagation of cosmic rays inside our galaxy plays a fundamental role in shaping their injection spectra into those observed at Earth. One of the best tools to investigate this issue is the ratio of fluxes for secondary and primary species. The boron-to-carbon (B/C) ratio, in particular, is a sensitive probe to investigate propagation mechanisms. This paper presents new measurements of the absolute fluxes of boron and carbon nuclei, as well as the B/C ratio, from the PAMELA space experiment. The results span the range 0.44 - 129 GeV/n in kinetic energy for data taken in the period July 2006 - March 2008.

TRAPPED PROTON FLUXES AT LOW EARTH ORBITS MEASURED BY THE PAMELA EXPERIMENT

We report an accurate measurement of the geomagnetically trapped proton fluxes for kinetic energy above similar to 70 MeV performed by the PAMELA mission at low Earth orbits (350 divided by 610 km) ...

Measurements of Cosmic-Ray Hydrogen and Helium Isotopes with the PAMELA experiment

The cosmic-ray hydrogen and helium (

PAMELA's Measurements of Magnetospheric Effects on High-energy Solar Particles

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Time Dependence of the Electron and Positron Components of the Cosmic Radiation Measured by the PAMELA Experiment between July 2006 and December 2015.

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Reentrant albedo proton fluxes measured by the PAMELA experiment

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Measurement of the isotopic composition of hydrogen and helium nuclei in cosmic rays with the pamela-experiment

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PAMELA's measurements of geomagnetic cutoff variations during the 14 December 2006 storm

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New Upper Limit on Strange Quark Matter Abundance in Cosmic Rays with the PAMELA Space Experiment

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