Abstract Depth dependency of neutrons produced by cosmic rays (CRs) in the lunar subsurface was estimated using the three-dimensional Monte Carlo particle and heavy ion transport simulation code, PHITS, incorporating the latest high energy nuclear data, JENDL/HE-2007. The PHITS simulations of equilibrium neutron density profiles in the lunar subsurface were compared with the measurement by Apollo 17 Lunar Neutron Probe Experiment (LNPE). Our calculations reproduced the LNPE data except for the 350–400mg/cm2 region under the improved condition using the CR spectra model based on the latest observations, well-tested nuclear interaction models with systematic cross section data, and JENDL/HE-2007.
Depth dependency of neutron density produced by cosmic rays in the lunar subsurface
Advances in Space Research ; 54 , 10 ; 2114-2121
2014-02-01
8 pages
Article (Journal)
Electronic Resource
English
Depth dependency of neutron density produced by cosmic rays in the lunar subsurface
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