| タイトル | Direct measurement of the composition and spectra of cosmic rays above 1 TeV/amu from JACEE |
| 著者（英） | Burnett, T. H.; Derrickson, J. H.; Fountain, W. F.; Jones, W. V.; Dake, S.; Parnell, T. A. |
| 著者所属（英） | Kobe Univ.|Washington Univ.|NASA Marshall Space Flight Center |
| 発行日 | 1989-01-01 |
| 言語 | eng |
| 内容記述 | Direct measurements on cosmic ray protons through iron above about 1 TeV/amu have been performed in a series of balloon-borne experiments with emulsion chambers. The measured energy spectra of protons and helium are power laws with exponents of 2.77 + or - 0.09 and 2.72 + or - 0.11 in the energy range 5 to 500 TeV and 2 to 50 TeV/amu, respectively. The proton spectrum shows no evidence of the steepening near 2 TeV which was reported by other experiments. Helium has a slightly higher intensity compared to extrapolations from lower energy measurements. The heavier elements, carbon to sulfur, show a small tendency for intensity enhancement in the relative abundance obove 10 TeV/amu. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 90A15457 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/359629 |
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