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

^*この研究の対応する著者

研究成果: Article › 査読

2 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	2114-2121
ページ数	8
ジャーナル	Advances in Space Research
巻	54
号	10
DOI	https://doi.org/10.1016/j.asr.2014.02.002
出版ステータス	Published - 2014 11月 15

ASJC Scopus subject areas

航空宇宙工学
宇宙惑星科学

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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",

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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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JO - Life sciences and space research

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IS - 10

ER -

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

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