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Title:
Deuterium synthesis during the solar flare of May 24, 1990 - GRANAT satellite observations of delayed 2.2-MeV gamma-line emission
Authors:
Terekhov, O. V.; Sunyaev, R. A.; Kuznetsov, A. V.; Barat, C.; Talon, R.; Trottet, G.; Vilmer, N.
Affiliation:
AA(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AB(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AC(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AD(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AE(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AF(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France), AG(RAN, Inst. Kosmicheskikh Issledovanii, Moscow, Russia; Centre d'Etude Spatiale des Rayonnements, Toulouse; Meudon, Observatoire, France)
Publication:
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 19, no. 3, p. 163-171. In Russian. In Russian.
Publication Date:
03/1993
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
DEUTERIUM, GAMMA RAY BURSTS, LIGHT CURVE, SOLAR FLARES, GAMMA RAY SPECTRA, SOLAR FLUX DENSITY
Bibliographic Code:
1993PAZh...19..163T

Abstract

During a bright solar flare on May 24, 1990, strong radiation in the 2.2-MeV line was detected by the PHEBUS instrument on board the Granat observatory. The observed 2.2-MeV line emission maximum is delayed for about 100 s with respect to the emission maxima in both the 4-6 and 65-120 MeV energy ranges. The decaying 2.2-MeV line photon flux was detected for a period of more than 8 min after the 4-6 MeV intensity maximum. The 2.2-MeV line fluence throughout the flare was 345 +/- 6 photons/sq cm, which corresponds to the observed synthesis of over 3 tons of deuterium on the solar surface.

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