Effects of an Rtg Power Source on Neutron Spectroscopy Measurements on the Martian Surface

1293, 2001; [5] Jun I., JPL, pers. comm., 2002; [6] Hahn et al., IEEE Trans. Nuc. Sci., submitted, 2002; [7] Waters, MCNPX Users Manual, LA-UR 02-2607, 2002. Figure 1. Schematic diagram of the NS, rover, and Martian surface model used for this study. Figure 2. Epithermal neutrons (counts per second) versus H2O content for the bottom dry layer. Black and left scale are for the RTG case; red and right scale are for the GCR case. Solid circles are for a 15 cm thick dry layer; open triangles are for a 70 cm thick dry layer. Figure 3. Relative epithermal neutrons versus H2O content for the bottom dry layer. Black symbols are for the RTG case; red symbols are for the GCR case. Solid circles are for a 15 cm thick dry layer; open triangles are for a 70 cm thick dry layer. Figure 4. Thermal neutrons (counts per second) versus H2O content for the bottom dry layer. Black and left scale are for the RTG case; red and right scale are for the GCR case. Solid circles are for a 15 cm thick dry layer; open triangles are for a 70 cm thick dry layer. dry Martian soil hydrated Martian soil NS attached to rover model RTG location rover mass model Lunar and Planetary Science XXXIV (2003) 1763.pdf