Neutron production in the lunar subsurface from galactic cosmic rays

Shuya Ota; Lembit Sihver; Shingo Kobayashi; Nobuyuki Hasebe

doi:10.1109/AERO.2010.5447009

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 proceeding › Conference contribution

1 Citation (Scopus)

Abstract

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 language	English
Title of host publication	IEEE Aerospace Conference Proceedings
DOIs	https://doi.org/10.1109/AERO.2010.5447009
Publication status	Published - 2010
Event	2010 IEEE Aerospace Conference - Big Sky, MT Duration: 2010 Mar 6 → 2010 Mar 13

Other

Other	2010 IEEE Aerospace Conference
City	Big Sky, MT
Period	10/3/6 → 10/3/13

ASJC Scopus subject areas

Aerospace Engineering
Space and Planetary Science

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10.1109/AERO.2010.5447009

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@inproceedings{cae896f186874c55989195c83512c084,

title = "Neutron production in the lunar subsurface from galactic cosmic rays",

abstract = "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.",

author = "Shuya Ota and Lembit Sihver and Shingo Kobayashi and Nobuyuki Hasebe",

year = "2010",

doi = "10.1109/AERO.2010.5447009",

language = "English",

isbn = "9781424438884",

booktitle = "IEEE Aerospace Conference Proceedings",

note = "2010 IEEE Aerospace Conference ; Conference date: 06-03-2010 Through 13-03-2010",

}

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T1 - Neutron production in the lunar subsurface from galactic cosmic rays

AU - Ota, Shuya

AU - Sihver, Lembit

AU - Kobayashi, Shingo

AU - Hasebe, Nobuyuki

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=77952848037&partnerID=8YFLogxK

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U2 - 10.1109/AERO.2010.5447009

DO - 10.1109/AERO.2010.5447009

M3 - Conference contribution

AN - SCOPUS:77952848037

SN - 9781424438884

BT - IEEE Aerospace Conference Proceedings

T2 - 2010 IEEE Aerospace Conference

Y2 - 6 March 2010 through 13 March 2010

ER -

Neutron production in the lunar subsurface from galactic cosmic rays

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