[22a-W833-1~12] 2.3 Application, radiation generators, new technology

[22a-W833-6] Numerical Estimation of Gamma-ray fluxes from Martian Moons

〇(D)Masayuki Naito¹, Kohei Yoshida¹, Junya Ishii¹, Daisuke Aoki¹, Hiroshi Nagaoka¹, Hiroki Kusano¹, Nobuyuki Hasebe¹ (1.Waseda Univ.)

Keywords:gamma-ray,neutron,GNS

Explorations of Martian moons have never performed and the origin of them still remains mysterious. There are two leading ideas of giant impact and captured asteroids for the origin of two moons. However, any conclusive evidences have never been obtained. Giant impact origin indicates that a large fraction of the Martian moons have similar composition of Mars while captured asteroid origin indicates that the Martian moons have primitive chondritic composition. "Mars Moon eXploration (MMX)" is planned to give an important restraint of the origin. Gamma-ray and neutron spectrometer is proposed as one of the payloads on the MMX. In this work, gamma-ray emission from various samples was calculated to ensure the performance of gamma-ray and neutron spectrometer. According to meteorite composition, Martian meteorites is rich in Si and Ca. On the other hands, primitive chondrites is depleted in Si and Ca. Therefore, we paid attention to Si/Fe and Ca/Fe as an indicator to distinguish these two elemental compositions.
Numerical results will be shown in presentation.