Intensity variation of gamma rays due to water concentrations on the lunar surface

K. Iwabuchi, N. Yamashita, S. Kobayashi, K. Hayatsu, M. Hareyama, Y. Karouji, K. Sakurai, Nobuyuki Hasebe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fluxes of gamma rays emitted from the lunar surface consisting from ferroan anorthosite with various concentration of water (H2O) were calculated with Geant4. They are useful to the current and future lunar missions for the projects to search for the existence of water in the lunar polar regions with a gamma-ray spectrometer. The result thus obtained indicates that the flux of gamma-rays with 2223 keV due to the reactions 1H(n, γ)2D has a monotonous dependence on the concentration of HzO from 0.1 to 20 wt% and the flux of 4934 keV gamma-rays due to the reactions 28Si(n, y)29Si is remarkably correlated with the abundance oh H2O. The variation of these gamma-ray fluxes dependent on the concentration of H2O is also discussed with the neutron density profile in the lunar subsurface.

Original languageEnglish
Title of host publicationAstroparticle, Particle and Space Physics, Detectors and Medical Physics Applications - Proceedings of the 10th Conference
Pages829-833
Number of pages5
Publication statusPublished - 2008
Externally publishedYes
EventInternational Conference on Advanced Technology and Particle Physics, ICATPP 2007 - Como
Duration: 2007 Oct 82007 Oct 12

Other

OtherInternational Conference on Advanced Technology and Particle Physics, ICATPP 2007
CityComo
Period07/10/807/10/12

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Nuclear and High Energy Physics

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    Iwabuchi, K., Yamashita, N., Kobayashi, S., Hayatsu, K., Hareyama, M., Karouji, Y., Sakurai, K., & Hasebe, N. (2008). Intensity variation of gamma rays due to water concentrations on the lunar surface. In Astroparticle, Particle and Space Physics, Detectors and Medical Physics Applications - Proceedings of the 10th Conference (pp. 829-833)