| タイトル | HEAO 1 observations of gamma-ray lines from a solar flare |
| 著者（英） | Gruber, D. E.; Nolan, P. L.; Hudson, H. S.; Bai, T.; Matteson, J. L.; Peterson, L. E. |
| 著者所属（英） | California Univ. |
| 発行日 | 1980-03-01 |
| 言語 | eng |
| 内容記述 | HEAO 1 observed gamma radiation, including the 2.223 MeV line of deuterium and the 4.43 MeV line of C-12, from a white-light solar flare of 1978 July 11. Line strengths over a 4 minute integration were 1.00 + or - 0.29 and 0.18 + or - 0.07 photons/sq cm s, respectively, and the continuum in the 1-5 MeV range fitted a spectrum 10 E to the -3rd photons/sq cm s keV. The 2.2 MeV line lagged 94 + or - 30 s behind the gamma-ray continuum, which itself was delayed about 20 s from the hard X-ray (not less than 40 keV) and microwave fluxes. This is the second flare for which both MeV-range lines and continuum have been observed, and the first for which simultaneous white-light observations exist. The prompt gamma-ray line (4.43 MeV) can be directly interpreted as an energy deposition of not greater than 7 x 10 to the 26th ergs per sec by energetic protons at photospheric depths. This is insufficient to maintain the white-light continuum by normal photospheric emission mechanisms. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 80A29331 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/422255 |
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