Neutron production in the lunar subsurface from galactic cosmic rays

Shuya Ota*, Lembit Sihver, Shingo Kobayashi, Nobuyuki Hasebe

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)


    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. The PHITS simulations of equilibrium neutron density profiles in the lunar subsurface were compared with experimental data by the Apollo 17 Lunar Neutron Probe Experiment. By use of the latest GCR spectra based on BESS measurements and well-benchmarked nuclear interaction models, our calculations well reproduced the data within the experimental error of 15% (measurement) + 30% (systematic) at the region shallower than 300 g/cm 2. However, our calculation showed 10-20% higher values in the deeper region.

    Original languageEnglish
    Title of host publicationIEEE Aerospace Conference Proceedings
    Publication statusPublished - 2010
    Event2010 IEEE Aerospace Conference - Big Sky, MT
    Duration: 2010 Mar 62010 Mar 13


    Other2010 IEEE Aerospace Conference
    CityBig Sky, MT

    ASJC Scopus subject areas

    • Aerospace Engineering
    • Space and Planetary Science


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