Theoretical fluxes of gamma rays from the Martian surface

Details Theoretical fluxes of gamma rays from the Martian surface Theoretical fluxes of gamma rays from the Martian surface

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgre..11103s09k&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue E3, CiteID E03S09

Other

3

Planetary Sciences: Solid Surface Planets: Composition (1060, 3672), Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solid Surface Planets: Instruments And Techniques, Planetary Sciences: Solar System Objects: Mars

Scientific paper

Theoretical fluxes of gamma rays escaping the surface of Mars were calculated. These and other calculated fluxes are needed to model the counting rates in the Mars Odyssey gamma ray spectrometer that are used to determine elemental compositions and other results using these measurements. Cross sections for the formation of gamma rays by both thermal and fast neutrons were compiled and evaluated. These evaluated cross sections were used with neutron fluxes calculated with the Monte Carlo N Particle Extended (MCNPX) code to get gamma ray production rates as a function of depth in the Martian surface. The fluxes of these gamma rays as a function of angle at the Martian surface were then calculated using gamma ray attenuation coefficients.

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