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

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dc.contributor.organizationfi=avaruustutkimuslaboratorio|en=Space Research Laboratory|
dc.contributor.organization-code1.2.246.10.2458963.20.47833719389
dc.contributor.organization-code2606702
dc.converis.publication-id2666478
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/2666478
dc.date.accessioned2022-10-28T12:48:31Z
dc.date.available2022-10-28T12:48:31Z
dc.description.abstract<p> A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show, for the first time, that above &sim;200GeV the positron fraction no longer exhibits an increase with energy.</p>
dc.identifier.jour-issn0031-9007
dc.identifier.olddbid179130
dc.identifier.oldhandle10024/162224
dc.identifier.urihttps://www.utupub.fi/handle/11111/36626
dc.identifier.urlhttp://api.elsevier.com/content/abstract/scopus_id:84907246464
dc.identifier.urnURN:NBN:fi-fe2021042714767
dc.okm.affiliatedauthorValtonen, Eino
dc.okm.affiliatedauthorBattarbee, Markus
dc.okm.affiliatedauthorEronen, Timo
dc.okm.affiliatedauthorTorsti, Jarmo
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherAmerican Physical Society
dc.relation.doi10.1103/PhysRevLett.113.121101
dc.relation.ispartofjournalPhysical Review Letters
dc.relation.issue12
dc.relation.volume113
dc.source.identifierhttps://www.utupub.fi/handle/10024/162224
dc.titleHigh 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
dc.year.issued2014

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