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

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

doi:10.1016/j.asr.2014.02.002

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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (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 language	English
Pages (from-to)	2114-2121
Number of pages	8
Journal	Advances in Space Research
Volume	54
Issue number	10
DOIs	https://doi.org/10.1016/j.asr.2014.02.002
Publication status	Published - 2014 Nov 15

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

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10.1016/j.asr.2014.02.002

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title = "Depth dependency of neutron density produced by cosmic rays in the lunar subsurface",

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.",

keywords = "Cosmic rays, High energy nuclear data, Lunar and planetary spectroscopy, Moon, Neutron density, PHITS",

author = "S. Ota and L. Sihver and S. Kobayashi and Nobuyuki Hasebe",

year = "2014",

month = nov,

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language = "English",

volume = "54",

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journal = "Life sciences and space research",

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T1 - Depth dependency of neutron density produced by cosmic rays in the lunar subsurface

AU - Ota, S.

AU - Sihver, L.

AU - Kobayashi, S.

AU - Hasebe, Nobuyuki

PY - 2014/11/15

Y1 - 2014/11/15

N2 - 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.

AB - 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.

KW - Cosmic rays

KW - High energy nuclear data

KW - Lunar and planetary spectroscopy

KW - Moon

KW - Neutron density

KW - PHITS

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DO - 10.1016/j.asr.2014.02.002

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SN - 0273-1177

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JO - Life sciences and space research

JF - Life sciences and space research

IS - 10

ER -

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

Abstract

Keywords

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