Measurement of the high-energy gamma-ray emission from the Moon with the Fermi Large Area Telescope
Measurement of the high-energy gamma-ray emission from the Moon with the Fermi Large Area Telescope
复制标题
用费米大面积望远镜测量月球高能伽马射线发射
DOI：
10.1103/physrevd.93.082001
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发表时间：
2016
影响因子：
5
通讯作者：
(Fermi-LAT Collaoration)
中科院分区：
文献类型：
--
作者：
M. Ackermann;T. Kamae et al.;(Fermi-LAT Collaoration)
我们使用费米卫星上的大面积望远镜在运行的头七年中收集的数据测量了月球的伽马射线发射光谱，能量范围从30 MeV到几GeV。我们还研究了通量的时间演化，发现了与太阳活动的关系。我们已经开发了一个完整的蒙特卡洛模拟，描述了宇宙射线与月球表面的相互作用。目前的分析结果可以在这个模型的框架内解释，其中伽马射线的产生是由于宇宙射线质子和氦原子核与月球表面的相互作用。最后，我们使用我们的模拟从月球伽马射线数据中得出了地球附近的宇宙射线质子和氦的能谱。
We have measured the gamma-ray emission spectrum of the Moon using the data collected by the Large Area Telescope onboard the Fermi satellite during its first seven years of operation, in the energy range from 30 MeV up to a few GeV. We have also studied the time evolution of the flux, finding a correlation with the solar activity. We have developed a full Monte Carlo simulation describing the interactions of cosmic rays with the lunar surface. The results of the present analysis can be explained in the framework of this model, where the production of gamma rays is due to the interactions of cosmic-ray proton and helium nuclei with the surface of the Moon. Finally, we have used our simulation to derive the cosmic-ray proton and helium spectra near Earth from the Moon gamma-ray data.