BEXCO - Room F(201/202/203/204)
[GA014] Study of Solar Gamma Rays basing on Geant4 code
Recently, increasing attention is being payed to the solar gamma-rays, which are mainly produced by the hadronic interactions of cosmic rays with the solar atmosphere. The solar gamma-rays with energy up to 100 GeV have been observed by Fermi. Some theoretical works have been done to estimate the flux of solar gamma-rays, while the measurement result cannot be reproduced. In this work, we will estimate the solar gamma-ray emission basing on the Geant4 code. An approximate solar atmosphere and Sun are constructed in the code. The cosmic rays are generated in an attitude of 600km above the solar surface. The gamma rays, produced by the hadronic interactions of cosmic rays with the solar atmosphere, are traced until they are absorbed or escape from the solar atmosphere. Finally, the flux and spectrum for observers on Earth are presented. Some comparison between our result and others are also presented.