Study of 20 January 2005 solar flare area by certain gamma gamma-ray lines

摘要

Basing on the AVS AVS-F apparatus data of SONG SONG-D detector onboard CORONAS CORONAS-F satellite on definite gamma gamma-ray lines lines, we study the extreme solar event of 20 Janua , January 2005. By the statistical modeling method we calc ry calcu- ulate the 2.223 MeV late γ-line time profile. The calculations have been performed in assumption of the Bessel type of a ac-ccelerated particles energy spectrum, different celerated 3 content in the nuclear reactions regio region and several density mo n mod- dels of the solar atmosphere. A comparison the results of modeling with observable data reveals the increasing of els 3He content in relation to 1H with the time of flare duration from the small level of 2×10-5 at the phase of increasin increasing of the g gamma gamma-ray flux up to 2×10-4 at the decay phase. In the same period the spectral index αT of protons has increased (the spectrum became harder) and the density of solar atmosphere has increased too. When averaging over full time of 2.223 MeV γ-emis emission, the ratio sion, 3He/ 1H=(1.4 ±0.15) ×10 10-4, the spectral index of protons energy , αT is rather close to 0.1 (a rough estimation), and the density model with enlarged density up to 2×10 17G M-3 in the lower chromosphere and in whole thickness of the photosphere is realized.