A study of the primary cosmic ray composition in the energy range 5ṡ1014-5ṡ1015 eV is performed through the analysis of the deep underground muons and of the e.m. component of Extensive Air Showers detected in coincidence by the MACRO and EAS-TOP experiments at the Gran Sasso Laboratory. We conclude that: a) pure proton and Iron primary beams are excluded by the experimental data; b) a fraction of nuclei heavier than Helium is necessary to explain the experimental data both below and above the knee; c) a mixed composition, obtained a priori from extrapolations of the spectra directly measured below 100 TeV, yields a reasonable account of the observations up to the knee of the primary spectrum. © 1994.
Study of the primary cosmic ray composition around the knee of the energy spectrum / Aglietta M.; Alessandro B.; Antonioli P.; Arneodo F.; Bergamasco L.; Bertaina M.; Fauth A.C.; Castagnoli C.; Castellina A.; Cattadori C.; Chiavassa A.; Cini G.; D'Ettorre Piazzoli B.; Di Sciascio G.; Fulgione W.; Galeotti P.; Ghia P.L.; Iacovacci M.; Mannocchi G.; Melagrana C.; Morello C.; Navarra G.; Riccati L.; Saavedra O.; Trinchero G.C.; Vallania P.; Vernetto S.; Ahlen S.; Ambrosio M.; Antolini R.; Auriemma G.; Baker R.; Baldini A.; Barbarino G.C.; Barish B.C.; Battistoni G.; Bellotti R.; Bemporad C.; Bernardini P.; Bilokon H.; Bisi V.; Bloise C.; Bower C.; Bussino S.; Cafagna F.; Calicchio M.; Campana D.; Carboni M.; Cecchini S.; Cei F.; Chiarella V.; Cormack R.; Corona A.; Coutu S.; DeCataldo G.; Dekhissi H.; DeMarzo C.; De Mitri M.; De Vincenzi M.; Di Credico A.; Diehl E.; Erriquez O.; Favuzzi C.; Ficenec D.; Forti C.; Fusco P.; Giacomelli G.; Giannini G.; Giglietto N.; Goretti M.; Grassi M.; Green P.; Grillo A.; Guarino F.; Guarnaccia P.; Gustavino C.; Habig A.; Hanson K.; Heinz R.; Hong J.T.; Iarocci E.; Katsavounidis E.; Kearns E.; Klein S.; Kyriazopoulou S.; Lamanna E.; Lane C.; Levin D.S.; Lipari P.; Liu G.; Liu R.; Longo M.J.; Lu Y.; Ludlam G.; Mancarella G.; Mandrioli G.; Margiotta-Neri A.; Marin A.; Marini A.; Martello D.; Chiesa A.M.; Matteuzzi P.; Mazziotta M.N.; Michael D.G.; Mikheyev S.; Miller L.; Mittelbrun M.; Monacelli P.; Montaruli T.; Monteno M.; Mufson S.; Musser J.; Nicolo D.; Nolty R.; Nutter S.; Okada C.; Osteria G.; Palamara O.; Parlati S.; Patera V.; Patrizii L.; Pavesi B.; Pazzi R.; Peck C.W.; Petrakis J.; Petrera S.; Pignatano N.D.; Pistilli P.; Raino A.; Reynoldson J.; Ronga F.; Sanzani G.; Sanzgiri A.; Sartogo F.; Satriano C.; Satta L.; Scapparone E.; Scholberg K.; Sciubba A.; Lugaresi P.S.; Severi M.; Sitta M.; Spinelli P.; Spinetti M.; Spurio M.; Steele J.; Steinberg R.; Stone J.L.; Sulak L.R.; Surdo A.; Tarle G.; Togo V.; Valente V.; Walter C.W.; Webb R.; Worstell W.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 337:3-4(1994), pp. 376-382. [10.1016/0370-2693(94)90991-1]
Study of the primary cosmic ray composition around the knee of the energy spectrum
Giacomelli G.;Margiotta-Neri A.;Patrizii L.;Spurio M.;
1994
Abstract
A study of the primary cosmic ray composition in the energy range 5ṡ1014-5ṡ1015 eV is performed through the analysis of the deep underground muons and of the e.m. component of Extensive Air Showers detected in coincidence by the MACRO and EAS-TOP experiments at the Gran Sasso Laboratory. We conclude that: a) pure proton and Iron primary beams are excluded by the experimental data; b) a fraction of nuclei heavier than Helium is necessary to explain the experimental data both below and above the knee; c) a mixed composition, obtained a priori from extrapolations of the spectra directly measured below 100 TeV, yields a reasonable account of the observations up to the knee of the primary spectrum. © 1994.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
