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Trapped Positrons and Electrons in the Inner Radiation Belt According to Data of the PAMELA Experiment
Natl Res Nucl Univ MEPhI, Kashirskoe Sh 31, Moscow 115409, Russia..
Univ Firenze, Dipartimento Fis, Piazza S Marco 4, I-50121 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, Via Giovanni Sansone 1, I-50019 Sesto Fiorentino, FI, Italy..
Russian Acad Sci, Lebedev Phys Inst, Leninskii Pr 53, Moscow 119991, Russia..
Univ Napoli Federico II, Dipartimento Fis, Corso Umberto I 40, I-80138 Naples, NA, Italy.;Ist Nazl Fis Nucl, Sez Napoli, Str Comunale Cintia, I-80126 Naples, NA, Italy..
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2018 (English)In: Physics of Atomic Nuclei, ISSN 1063-7788, E-ISSN 1562-692X, Vol. 81, no 4, p. 515-519Article in journal (Refereed) Published
Abstract [en]

Measurements of secondary-electron and secondary-positron fluxes below the geomagnetic cutoff in near-Earth space were performed by means of the PAMELA magnetic spectrometer installed on board the Resurs-DK1 satellite launched on June 15, 2006, in an elliptical orbit of inclination 70A degrees and altitude 350 to 600 km. This spectrometer permits measuring the fluxes of electrons and positrons over a wide energy range, as well as determining their spatial distributions to a precision of about 2A degrees. A calculation of particle trajectories in the geomagnetic field makes it possible to separate electrons and positrons originating from cosmic-ray interactions in the Earth's magnetosphere. The spatial distributions of quasitrapped, trapped, and short-lived albedo positrons and electrons of energy above 70 MeV in the radiation belt were analyzed. The ratio of the electron-to-positron fluxes and the energy spectra of the electrons and positrons in question are indicative of different productionmechanisms for stably trapped and quasitrapped secondary particles.

Place, publisher, year, edition, pages
PLEIADES PUBLISHING INC , 2018. Vol. 81, no 4, p. 515-519
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Physical Sciences
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URN: urn:nbn:se:kth:diva-234208DOI: 10.1134/S1063778818040129ISI: 000441871000012Scopus ID: 2-s2.0-85051714633OAI: oai:DiVA.org:kth-234208DiVA, id: diva2:1246047
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QC 20180906

Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-10-19Bibliographically approved

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Carlson, PerPearce, Mark

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