抄録
A series of Balloon-borne Experiments with a Superconducting Spectrometer, BESS, has been made since 1993. We report here the absolute cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, as measured by the 1998 balloon flight of the BESS spectrometer. Those spectra were determined within overall uncertainties of ±5 % for protons and ±10 % for helium nuclei including statistical and systematic errors. The covered energy range is relevant to the atmospheric neutrinos observed as "fully contained events" in Super-Kamiokande. In order to extend the energy range up to around 1 TeV, we have started to design and develop new tracking detectors. Those energy spectra in a higher energy region will help to estimate the interstellar spectra of primary cosmic rays and the absolute fluxes of "up-going muons."
本文言語 | English |
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ページ(範囲) | 761-766 |
ページ数 | 6 |
ジャーナル | Advances in Space Research |
巻 | 27 |
号 | 4 |
DOI | |
出版ステータス | Published - 2001 |
外部発表 | はい |
ASJC Scopus subject areas
- 航空宇宙工学
- 天文学と天体物理学
- 地球物理学
- 大気科学
- 宇宙惑星科学
- 地球惑星科学(全般)