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Fig. 10.


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Particle spectra on the Martian surface calculated for the time period between 19 August 2012 and 17 February 2013 by different simulation tools: GEANT4 (red), PHITS (blue), HZETRN/OLTARIS (ocher). Particle types are, from top to bottom: electron/positron, μ/μ+, π/π+. Positron, μ+ and π+ are indicated by the dashed lines and scaled by 0.1 for separation.

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