Physics – Medical Physics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apsp.conf..719o&link_type=abstract
ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 11th Conference. Held
Physics
Medical Physics
Scientific paper
The neutron production from galactic cosmic ray (GCR) protons and alpha particles in the lunar subsurface was estimated using the three-dimensional Monte Carlo simulation code PHITS, together with GCR input spectra based on the BESS measurements. The PHITS simulations of equilibrium neutron density profiles in the lunar subsurface were compared with experimental data by Apollo 17 Lunar Neutron Probe Experiment. By use of accurate spectra and nuclear interaction models, our calculations successfully reproduced the data within the experimental error at the shallower region than 300 g/cm2. However, our calculation was up to 30% higher in the deeper region.
Hasebe Nobuyuki
Kobayashi Shingo
Ota Shuya
Sihver Lembit
Yamashita Naoyuki
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