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

S. Ota ; Lembit Sihver (Institutionen för teknisk fysik, Nukleär teknik) ; S. Kobayashi ; N. Hasebe
Advances in Space Research (0273-1177). Vol. 54 (2014), 10, p. 2114-2121.
[Artikel, refereegranskad vetenskaplig]

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/cm(2) 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.

Nyckelord: Neutron density; Cosmic rays; Lunar and planetary spectroscopy; Moon; PHITS; High energy nuclear data

Denna post skapades 2014-12-29.
CPL Pubid: 209126


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)


Astronomi, astrofysik och kosmologi

Chalmers infrastruktur