The November 22, 1977 solar flare: Evidence for 2.23 and 4.43 MeV line emission from the signe 2MP experiment
✍ Scribed by G. Chambon; K. Hurley; M. Niel; R. Talon; G. Vedrenne; I. V. Estuline; O. B. Likine
- Publisher
- Springer
- Year
- 1981
- Tongue
- English
- Weight
- 685 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
✦ Synopsis
The November 22, 1977 solar flare was observed at energies up to 4.9 MeV by French-built gamma ray detectors aboard the Soviet Prognoz-6 satellite. The data show evidence for 2.23 and 4.43 MeV line emission, with the 2.23 MeV emi~sio.n occurring about 3 rain after the flare onset in hard X-rays. The line intensities, 0.11 cm -2 s -1 and -0.06 cm -2 s 1 for the 2.23 and 4.43 lines, respectively, are roughly comparable to intensities observed in other events. Particle detectors aboard the Prognoz-6 satellite, however, recorded a proton flux much lower than that observed for the 4 August 1972 event. It is shown that this may be taken as evidence for a thick target interpretation of the proton interactions in the solar atmosphere.