Measurements of 0.2-20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer

被引:171
作者
Shikaze, Y.
Haino, S. [1 ]
Abe, K.
Fuke, H.
Hams, T.
Kim, K. C.
Makida, Y.
Matsuda, S.
Mitchell, J. W.
Moiseev, A. A.
Nishimura, J.
Nozaki, M.
Orito, S.
Ormes, J. F.
Sanuki, T.
Sasaki, M.
Seo, E. S.
Streitmatter, R. E.
Suzuki, J.
Tanaka, K.
Yamagami, T.
Yamamoto, A.
Yoshida, T.
Yoshimura, K.
机构
[1] KEK, Tsukuba, Ibaraki 3050801, Japan
[2] Kobe Univ, Kobe, Hyogo 6578501, Japan
[3] Inst Space & Astronaut Sci, Japan Aerosp Explorat Agcy, Kanagawa 2298510, Japan
[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[5] Univ Maryland, College Pk, MD 20742 USA
[6] Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan
基金
美国国家航空航天局; 美国国家科学基金会; 日本学术振兴会;
关键词
cosmic-ray proton; cosmic-ray helium; atmospheric proton; solar modulation; superconducting spectrometer;
D O I
10.1016/j.astropartphys.2007.05.001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We measured low energy cosmic-ray proton and helium spectra in the kinetic energy range 0.215-21.5 GeV/n at different solar activities during a period from 1997 to 2002. The observations were carried out with the BESS spectrometer launched on a balloon at Lynn Lake, Canada. A calculation for the correction of secondary particle backgrounds from the overlying atmosphere was improved by using the measured spectra at small atmospheric depths ranging from 5 through 37 g/cm(2). The uncertainties including statistical and systematic errors of the obtained spectra at the top of atmosphere are 5-7% for protons and 6-9% for helium nuclei in the energy range 0.5-5 GeV/n. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:154 / 167
页数:14
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