Measurement of the Iron Spectrum in Cosmic Rays from 10 GeV/n to 2.0 TeV/n with the Calorimetric Electron Telescope on the International Space Station

作     者：O. Adriani Y. Akaike K. Asano Y. Asaoka E. Berti G. Bigongiari W. R. Binns M. Bongi P. Brogi A. Bruno J. H. Buckley N. Cannady G. Castellini C. Checchia M. L. Cherry G. Collazuol K. Ebisawa H. Fuke S. Gonzi T. G. Guzik T. Hams K. Hibino M. Ichimura K. Ioka W. Ishizaki M. H. Israel K. Kasahara J. Kataoka R. Kataoka Y. Katayose C. Kato N. Kawanaka Y. Kawakubo K. Kobayashi K. Kohri H. S. Krawczynski J. F. Krizmanic J. Link P. Maestro P. S. Marrocchesi A. M. Messineo J. W. Mitchell S. Miyake A. A. Moiseev M. Mori N. Mori H. M. Motz K. Munakata S. Nakahira J. Nishimura G. A. de Nolfo S. Okuno J. F. Ormes N. Ospina S. Ozawa L. Pacini P. Papini B. F. Rauch S. B. Ricciarini K. Sakai T. Sakamoto M. Sasaki Y. Shimizu A. Shiomi P. Spillantini F. Stolzi S. Sugita A. Sulaj M. Takita T. Tamura T. Terasawa S. Torii Y. Tsunesada Y. Uchihori E. Vannuccini J. P. Wefel K. Yamaoka S. Yanagita A. Yoshida K. Yoshida 

作者机构：Department of Physics University of Florence Via Sansone 1 50019 Sesto Fiorentino Italy INFN Sezione di Florence Via Sansone 1 50019 Sesto Fiorentino Italy Waseda Research Institute for Science and Engineering Waseda University 17 Kikuicho Shinjuku Tokyo 162-0044 Japan JEM Utilization Center Human Spaceflight Technology Directorate Japan Aerospace Exploration Agency 2-1-1 Sengen Tsukuba Ibaraki 305-8505 Japan Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwa-no-Ha Kashiwa Chiba 277-8582 Japan Department of Physical Sciences Earth and Environment University of Siena via Roma 56 53100 Siena Italy INFN Sezione di Pisa Polo Fibonacci Largo B. Pontecorvo 3 56127 Pisa Italy Department of Physics and McDonnell Center for the Space Sciences Washington University One Brookings Drive St. Louis Missouri 63130-4899 USA Heliospheric Physics Laboratory NASA/GSFC Greenbelt Maryland 20771 USA Center for Space Sciences and Technology University of Maryland Baltimore County 1000 Hilltop Circle Baltimore Maryland 21250 USA Astroparticle Physics Laboratory NASA/GSFC Greenbelt Maryland 20771 USA Center for Research and Exploration in Space Sciences and Technology NASA/GSFC Greenbelt Maryland 20771 USA Institute of Applied Physics (IFAC) National Research Council (CNR) Via Madonna del Piano 10 50019 Sesto Fiorentino Italy Department of Physics and Astronomy Louisiana State University 202 Nicholson Hall Baton Rouge Louisiana 70803 USA Department of Physics and Astronomy University of Padova Via Marzolo 8 35131 Padova Italy INFN Sezione di Padova Via Marzolo 8 35131 Padova Italy Institute of Space and Astronautical Science Japan Aerospace Exploration Agency 3-1-1 Yoshinodai Chuo Sagamihara Kanagawa 252-5210 Japan Kanagawa University 3-27-1 Rokkakubashi Kanagawa Yokohama Kanagawa 221-8686 Japan Faculty of Science and Technology Graduate School of Science and Technology Hirosaki University 3 Bunkyo Hirosaki Aomori 036-8561 Japan Yukawa Institute for Theoretical Physics Kyoto University Kitashirakawa Oiwakecho Sakyo Kyoto 606-8502 Japan Department of Electronic Information Systems Shibaura Institute of Technology 307 Fukasaku Minuma Saitama 337-8570 Japan Waseda Research Institute for Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan National Institute of Polar Research 10-3 Midori-cho Tachikawa Tokyo 190-8518 Japan Faculty of Engineering Division of Intelligent Systems Engineering Yokohama National University 79-5 Tokiwadai Hodogaya Yokohama 240-8501 Japan Faculty of Science Shinshu University 3-1-1 Asahi Matsumoto Nagano 390-8621 Japan Hakubi Center Kyoto University Yoshida Honmachi Sakyo-ku Kyoto 606-8501 Japan Department of Astronomy Graduate School of Science Kyoto University Kitashirakawa Oiwake-cho Sakyo-ku Kyoto 606-8502 Japan Institute of Particle and Nuclear Studies High Energy Accelerator Research Organization 1-1 Oho Tsukuba Ibaraki 305-0801 Japan University of Pisa Polo Fibonacci Largo B. Pontecorvo 3 56127 Pisa Italy Department of Electrical and Electronic Systems Engineering National Institute of Technology Ibaraki College 866 Nakane Hitachinaka Ibaraki 312-8508 Japan Department of Astronomy University of Maryland College Park Maryland 20742 USA Department of Physical Sciences College of Science and Engineering Ritsumeikan University Shiga 525-8577 Japan Faculty of Science and Engineering Global Center for Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan Department of Physics and Astronomy University of Denver Physics Building Room 211 2112 East Wesley Avenue Denver Colorado 80208-6900 USA Quantum ICT Advanced Development Center National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei Tokyo 184-8795 Japan College of Science and Engineering Department of Physics and Mathematics Aoyama Gakuin University 5-10-1 Fuchinobe Chuo Sagamihara Kanagawa 252-5258 Japan College of Industrial Technology Nihon University 1-2-1 Izumi Narashino Chiba 275-8575 Japan RIKEN 2-1 Hirosawa Wako Saitama 351-0198 Japan Division of Mathematics and Physics Graduate School of Science Osaka City University 3-3-138 Sugimoto Sumiyoshi Osaka 558-8585 Japan National Institutes for Quantum and Radiation Science and Technology 4-9-1 Anagawa Inage Chiba 263-8555 Japan Nagoya University Furo Chikusa Nagoya 464-8601 Japan College of Science Ibaraki University 2-1-1 Bunkyo Mito Ibaraki 310-8512 Japan 

出 版 物：《Physical Review Letters》 (物理评论快报)

年 卷 期：2021年第126卷第24期

页      面：241101-241101页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Waseda University Japan Society for the Promotion of Science, KAKEN, (18H03700, 17H02901, 26220708, 20K22352, 19H05608) Japan Society for the Promotion of Science, KAKEN National Aeronautics and Space Administration, NASA, (NNX16AC02G, NNX16AB99G, NNH14ZDA001N-APRA-0075) National Aeronautics and Space Administration, NASA Advanced Science Institute, ASI, (2013-018-R.0) Advanced Science Institute, ASI Ministry of Education, Culture, Sports, Science and Technology-Supported Program for the Strategic Research Foundation, (S1101021) 

主　　题：Cosmic ray acceleration Cosmic ray composition & spectra Cosmic ray propagation Cosmic ray sources Cosmic rays & astroparticles 

摘      要：The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray iron over a wide energy interval. In this Letter a measurement of the iron spectrum is presented in the range of kinetic energy per nucleon from 10 GeV/n to 2.0 TeV/n allowing the inclusion of iron in the list of elements studied with unprecedented precision by space-borne instruments. The measurement is based on observations carried out from January 2016 to May 2020. The CALET instrument can identify individual nuclear species via a measurement of their electric charge with a dynamic range extending far beyond iron (up to atomic number Z=40). The energy is measured by a homogeneous calorimeter with a total equivalent thickness of 1.2 proton interaction lengths preceded by a thin (3 radiation lengths) imaging section providing tracking and energy sampling. The analysis of the data and the detailed assessment of systematic uncertainties are described and results are compared with the findings of previous experiments. The observed differential spectrum is consistent within the errors with previous experiments. In the region from 50 GeV/n to 2 TeV/n our present data are compatible with a single power law with spectral index −2.60±0.03.