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Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer

We report the observation of new properties of primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in the rigidity range 2.15 GV to 3.0 TV with $1.8\times10^6$  Ne, $2.2\times10^6$  Mg, and $1.6\times10^6$  Si nuclei collected by the Alpha Magnetic Spectrometer experiment on the International Space Station. The Ne and Mg spectra have identical rigidity dependence above 3.65 GV. The three spectra have identical rigidity dependence above 86.5 GV, deviate from a single power law above 200 GV, and harden in an identical way. Unexpectedly, above 86.5 GV the rigidity dependence of primary cosmic rays Ne, Mg, and Si spectra is different from the rigidity dependence of primary cosmic rays He, C, and O. This shows that the Ne, Mg, and Si and He, C, and O are two different classes of primary cosmic rays.

Phys. Rev. Lett. 124.211102 (2020)
NeMgSi

AMS-02 Publications

Published on: Editors' Suggestion Featured in Physics
Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 124.211102 (2020), Citations: 4, View supplemental material and data
Published on: Editors' Suggestion
Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer
Phys. Rev. Lett. 123, 181102 (2019), Citations: 7, View supplemental material and data
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Towards Understanding the Origin of Cosmic-Ray Electrons
Phys. Rev. Lett.122, 101101 (2019), Citations: 37, View supplemental material and data
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Towards Understanding the Origin of Cosmic-Ray Positrons
Phys. Rev. Lett. 122, 041102 (2019), Citations: 74, View supplemental material and data
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Precision Measurement of Cosmic-Ray Nitrogen and its Primary and Secondary Components with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.121, 051103 (2018), Citations: 34, View supplemental material and data
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Observation of Complex Time Structures in the Cosmic-Ray Electron and Positron Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051102 (2018), Citations: 41, View supplemental material and data
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Observation of Fine Time Structures in the Cosmic Proton and Helium Fluxes with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 121, 051101 (2018), Citations: 42, View supplemental material and data
Published on: Editors' Suggestion Featured in Physics
Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.120, 021101 (2018), Citations: 93, View supplemental material and data
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Observation of the Identical Rigidity Dependence of He, C, and O Cosmic Rays at High Rigidities by the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 119, 251101 (2017), Citations: 100, View supplemental material and data
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Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.117, 231102 (2016), Citations: 199, View supplemental material and data
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Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.117, 091103 (2016), Citations: 331, View supplemental material and data
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Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett.115, 211101 (2015), Citations: 310, View supplemental material and data
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Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 114, 171103 (2015), Citations: 549, View supplemental material and data
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Precision Measurement of the (${\rm e}^+$ + ${\rm e}^−$) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 221102 (2014), Citations: 270, View supplemental material and data
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Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 121102 (2014), Citations: 482, View supplemental material and data
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High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5 – 500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
Phys. Rev. Lett. 113, 121101 (2014), Citations: 536, View supplemental material and data
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First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
Phys. Rev. Lett. 110, 141102 (2013), Citations: 1,075, View supplemental material and data

* Citation information from High-Energy Physics Literature Database.