Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700GeV and the positron flux in the range 0.5 to 500GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior at 30GeV but the fluxes are significantly different in their magnitude and energy dependence. Between 20 and 200GeV the positron spectral index is significantly harder than the electron spectral index. The determination of the differing behavior of the spectral indices versus energy is a new observation and provides important information on the origins of cosmic-ray electrons and positrons.

Electron and positron fluxes in primary cosmic rays measured with the alpha magnetic spectrometer on the international space station

CONTIN, ANDREA;MASI, NICOLO';PALMONARI, FEDERICO;QUADRANI, LUCIO;
2014

Abstract

Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700GeV and the positron flux in the range 0.5 to 500GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior at 30GeV but the fluxes are significantly different in their magnitude and energy dependence. Between 20 and 200GeV the positron spectral index is significantly harder than the electron spectral index. The determination of the differing behavior of the spectral indices versus energy is a new observation and provides important information on the origins of cosmic-ray electrons and positrons.
M. Aguilar;D. Aisa;A. Alvino;G. Ambrosi;K. Andeen;L. Arruda;N. Attig;P. Azzarello;A. Bachlechner;F. Barao;A. Barrau;L. Barrin;A. Bartoloni;L. Basara;M. Battarbee;R. Battiston;J. Bazo;U. Becker;M. Behlmann;B. Beischer;J. Berdugo;B. Bertucci;G. Bigongiari;V. Bindi;S. Bizzaglia;M. Bizzarri;G. Boella;W. d. Boer;K. Bollweg;V. Bonnivard;B. Borgia;S. Borsini;M. J. Boschini;M. Bourquin;J. Burger;F. Cadoux;X. D. Cai;M. Capell;S. Caroff;J. Casaus;V. Cascioli;G. Castellini;I. Cernuda;F. Cervelli;M. J. Chae;Y. H. Chang;A. I. Chen;H. Chen;G. M. Cheng;H. S. Chen;L. Cheng;A. Chikanian;H. Y. Chou;E. Choumilov;V. Choutko;C. H. Chung;C. Clark;R. Clavero;G. Coignet;C. Consolandi;A. Contin;C. Corti;B. Coste;Z. Cui;M. Dai;C. Delgado;S. D. Torre;M. B. Demirkoz;L. Derome;S. D. Falco;L. D. Masso;F. Dimiccoli;C. Diaz;P. v. Doetinchem;W. J. Du;M. Duranti;D. D'Urso;A. Eline;F. J. Eppling;T. Eronen;Y. Y. Fan;L. Farnesini;J. Feng;E. Fiandrini;A. Fiasson;E. Finch;P. Fisher;Y. Galaktionov;G. Gallucci;B. Garcia;R. Garcia-Lopez;H. Gast;I. Gebauer;M. Gervasi;A. Ghelfi;W. Gillard;F. Giovacchini;P. Goglov;J. Gong;C. Goy;V. Grabski;D. Grandi;M. Graziani;C. Guandalini;I. Guerri;K. H. Guo;M. Habiby;S. Haino;K. C. Han;Z. H. He;M. Heil;J. Hoffman;T. H. Hsieh;Z. C. Huang;C. Huh;M. Incagli;M. Ionica;W. Y. Jang;H. Jinchi;K. Kanishev;G. N. Kim;K. S. Kim;T. Kirn;R. Kossakowski;O. Kounina;A. Kounine;V. Koutsenko;M. S. Krafczyk;S. Kunz;G. L. Vacca;E. Laudi;G. Laurenti;I. Lazzizzera;A. Lebedev;H. T. Lee;S. C. Lee;C. Leluc;H. L. Li;J. Q. Li;Q. Li;Q. Li;T. X. Li;W. Li;Y. Li;Z. H. Li;Z. Y. Li;S. Lim;C. H. Lin;P. Lipari;T. Lippert;D. Liu;H. Liu;T. Lomtadze;M. J. Lu;Y. S. Lu;K. Luebelsmeyer;F. Luo;J. Z. Luo;S. S. Lv;R. Majka;A. Malinin;C. Mana;J. Marin;T. Martin;G. Martinez;N. Masi;D. Maurin;A. Menchaca-Rocha;Q. Meng;D. C. Mo;L. Morescalchi;P. Mott;M. Muller;J. Q. Ni;N. Nikonov;F. Nozzoli;P. Nunes;A. Obermeier;A. Oliva;M. Orcinha;F. Palmonari;C. Palomares;M. Paniccia;A. Papi;E. Pedreschi;S. Pensotti;R. Pereira;F. Pilo;A. Piluso;C. Pizzolotto;V. Plyaskin;M. Pohl;V. Poireau;E. Postaci;A. Putze;L. Quadrani;X. M. Qi;P. G. Rancoita;D. Rapin;J. S. Ricol;I. Rodriguez;S. Rosier-Lees;A. Rozhkov;D. Rozza;R. Sagdeev;J. Sandweiss;P. Saouter;C. Sbarra;S. Schael;S. M. Schmidt;D. Schuckardt;A. S. von;G. Schwering;G. Scolieri;E. S. Seo;B. S. Shan;Y. H. Shan;J. Y. Shi;X. Y. Shi;Y. M. Shi;T. Siedenburg;D. Son;F. Spada;F. Spinella;W. Sun;W. H. Sun;M. Tacconi;C. P. Tang;X. W. Tang;Z. C. Tang;L. Tao;D. Tescaro;S. C. C.;S. M. Ting;N. Tomassetti;J. Torsti;C. Turkoglu;T. Urban;V. Vagelli;E. Valente;C. Vannini;E. Valtonen;S. Vaurynovich;M. Vecchi;M. Velasco;J. P. Vialle;L. Q. Wang;Q. L. Wang;R. S. Wang;X. Wang;Z. X. Wang;Z. L. Weng;K. Whitman;J. Wienkenhover;H. Wu;X. Xia;M. Xie;S. Xie;R. Q. Xiong;G. M. Xin;N. S. Xu;W. Xu;Q. Yan;J. Yang;M. Yang;Q. H. Ye;H. Yi;Y. J. Yu;Z. Q. Yu;S. Zeissler;J. H. Zhang;M. T. Zhang;X. B. Zhang;Z. Zhang;Z. M. Zheng;H. L. Zhuang;V. Zhukov;A. Zichichi;N. Zimmermann;P. Zuccon;C. Zurbach
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/377243
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 10
  • Scopus 464
  • ???jsp.display-item.citation.isi??? 247
social impact