Maps of Subsurface Hydrogen from the High Energy Neutron Detector, Mars Odyssey

After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2002-07, Vol.297 (5578), p.78-81
Hauptverfasser:	Mitrofanov, I., Anfimov, D., Kozyrev, A., Litvak, M., Sanin, A., V. Tret'yakov, Krylov, A., Shvetsov, V., Boynton, W., Shinohara, C., Hamara, D., Saunders, R. S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Atmosphere Clay soils Cosmic Radiation Energy Extraterrestrial Environment Gamma rays Hydrogen Ice Mars Mars (Planet) Materials Models, Theoretical Natural history Neutron capture gamma ray spectroscopy Neutrons Pixels Regolith Scientific Concepts Space exploration Spacecraft Spectrometry, Gamma Spectroscopy Spectrum Analysis Temperature Water
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Beschreibung
Zusammenfassung:	After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers that are tens of centimeters in thickness provide one possible fit to the data.
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1073616