Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 양종만 | - |
dc.contributor.author | 박일흥 | - |
dc.date.accessioned | 2016-08-28T12:08:11Z | - |
dc.date.available | 2016-08-28T12:08:11Z | - |
dc.date.issued | 2011 | - |
dc.identifier.issn | 2041-8205 | - |
dc.identifier.other | OAK-7289 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/221369 | - |
dc.description.abstract | Cosmic-ray proton and helium spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass experiment flown for 42 days in Antarctica in the 2004-2005 austral summer season. High-energy cosmic-ray data were collected at an average altitude of ∼38.5 km with an average atmospheric overburden of ∼3.9 g cm-2. Individual elements are clearly separated with a charge resolution of ∼0.15 e (in charge units) and ∼0.2 e for protons and helium nuclei, respectively. The measured spectra at the top of the atmosphere are represented by power laws with a spectral index of -2.66 ± 0.02 for protons from 2.5 TeV to 250 TeV and -2.58 ± 0.02 for helium nuclei from 630 GeV nucleon-1 to 63 TeV nucleon -1. They are harder than previous measurements at a few tens of GeV nucleon-1. The helium flux is higher than that expected from the extrapolation of the power law fitted to the lower-energy data. The relative abundance of protons to helium nuclei is 9.1 ± 0.5 for the range from 2.5 TeV nucleon-1 to 63 TeV nucleon-1. This ratio is considerably smaller than the previous measurements at a few tens of GeV nucleon-1. © 2011. The American Astronomical Society. All rights reserved. Printed in the U.S.A. | - |
dc.language | English | - |
dc.title | Cosmic-ray proton and helium spectra from the first cream flight | - |
dc.type | Article | - |
dc.relation.issue | 2 | - |
dc.relation.volume | 728 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.journaltitle | Astrophysical Journal Letters | - |
dc.identifier.doi | 10.1088/0004-637X/728/2/122 | - |
dc.identifier.wosid | WOS:000286973600048 | - |
dc.identifier.scopusid | 2-s2.0-79960243009 | - |
dc.author.google | Yoon Y.S. | - |
dc.author.google | Ahn H.S. | - |
dc.author.google | Allison P.S. | - |
dc.author.google | Bagliesi M.G. | - |
dc.author.google | Beatty J.J. | - |
dc.author.google | Bigongiari G. | - |
dc.author.google | Boyle P.J. | - |
dc.author.google | Childers J.T. | - |
dc.author.google | Conklin N.B. | - |
dc.author.google | Coutu S. | - |
dc.author.google | Duvernois M.A. | - |
dc.author.google | Ganel O. | - |
dc.author.google | Han J.H. | - |
dc.author.google | Jeon J.A. | - |
dc.author.google | Kim K.C. | - |
dc.author.google | Lee M.H. | - |
dc.author.google | Lutz L. | - |
dc.author.google | Maestro P. | - |
dc.author.google | Malinine A. | - |
dc.author.google | Marrocchesi P.S. | - |
dc.author.google | Minnick S.A. | - |
dc.author.google | Mognet S.I. | - |
dc.author.google | Nam S. | - |
dc.author.google | Nutter S. | - |
dc.author.google | Park I.H. | - |
dc.author.google | Park N.H. | - |
dc.author.google | Seo E.S. | - |
dc.author.google | Sina R. | - |
dc.author.google | Swordy S. | - |
dc.author.google | Wakely S.P. | - |
dc.author.google | Wu J. | - |
dc.author.google | Yang J. | - |
dc.author.google | Zei R. | - |
dc.author.google | Zinn S.Y. | - |
dc.contributor.scopusid | 양종만(15039320200;8833888100) | - |
dc.contributor.scopusid | 박일흥(7403243322;57199842780) | - |
dc.date.modifydate | 20230616163100 | - |