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THE POSSIBLE ORIGINS OF GAMMA EMISSION WITHIN THE ENERGY RANGE OF 15-21 MEV DURING SOLAR FLARE - NEW STUDIESтезисы доклада
- Авторы: Evgenia Troitskaia, Irene Arkhangelskaja, Arkhangelsky A.I.
- Сборник: 38th COSPAR Scientic Assembly, Abstracts
- Серия: ISSN 1815-2619
- Тезисы
- Год издания: 2010
- Место издания: www.cospar2010.org Bremen, Germany
- Первая страница: E25-0084-10
- Аннотация: For the first time gamma-emission within the energy range of 15-21 MeV was detected by AVS-F apparatus on board CORONAS-F satellite (detector SONG-D) for 20 January 2005 solar event[1]. The authors of [2] have interpreted the visible peak of gamma-emission as superposition of two effects: (i) capture of neutrons by 3He with a peak at 20.58 MeV and (ii) de-excitation line of 12C nuclei from 15.11 MeV level. In the present work we study both aspects in more details. Because of the smallness of the first reaction cross section its realization needs the enhanced content of 3He which also acts upon the time profile of 2.223 MeV gamma line. We present the model calculations on different assumptions on character of accelerated particle energy Bessel spectrum, initial angular distribution of produced in the flare neutrons and 3He enrichment. The results are compared with the data on 2.223 MeV gamma line time profile, measured during 20 January 2005 solar event. The relation of two de-excitation gamma-lines of 4.44 MeV and 15.11 MeV from 12C nuclei is also treated in more details. Presented results are useful to advance in understanding the nature of observable gamma-emission within the range of 15-21 MeV and the form of accelerated particles spectrum. [1] I.V. Arkhangelskaja, A.I. Arkhangelsky, Yu.D. Kotov, A.S. Glyanenko, P.A. Kalmykov./Advances in Space Research, Volume 43, Issue 4, 16 February 2009, Pages 589-593. 2009. [2] I.V. Arkhangelskaja, A.I. Arkhangelsky, E.V. Troitskaya, L.I. Miroshnichenko. /Advances in Space Research, Volume 43, Issue 4, 16 February 2009, Pages 594-599. 2009.
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