Depth dependency of neutron density produced by cosmic rays in the lunar subsurface

S. Ota, L. Sihver, S. Kobayashi, Nobuyuki Hasebe

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    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 350-400 mg/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.

    Original languageEnglish
    Pages (from-to)2114-2121
    Number of pages8
    JournalAdvances in Space Research
    Volume54
    Issue number10
    DOIs
    Publication statusPublished - 2014 Nov 15

    Fingerprint

    Cosmic rays
    cosmic ray
    neutron probe
    cosmic rays
    Neutrons
    neutrons
    simulation
    nuclear interactions
    probes
    nuclear energy
    cross section
    experiment
    Heavy ions
    Nuclear energy
    heavy ions
    ion
    Experiments
    cross sections
    profiles
    ions

    Keywords

    • Cosmic rays
    • High energy nuclear data
    • Lunar and planetary spectroscopy
    • Moon
    • Neutron density
    • PHITS

    ASJC Scopus subject areas

    • Aerospace Engineering
    • Space and Planetary Science

    Cite this

    Depth dependency of neutron density produced by cosmic rays in the lunar subsurface. / Ota, S.; Sihver, L.; Kobayashi, S.; Hasebe, Nobuyuki.

    In: Advances in Space Research, Vol. 54, No. 10, 15.11.2014, p. 2114-2121.

    Research output: Contribution to journalArticle

    Ota, S. ; Sihver, L. ; Kobayashi, S. ; Hasebe, Nobuyuki. / Depth dependency of neutron density produced by cosmic rays in the lunar subsurface. In: Advances in Space Research. 2014 ; Vol. 54, No. 10. pp. 2114-2121.
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