title: Maps of subsurface hydrogen from the high energy neutron detector, Mars Odyssey.
abstract: 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.
authors.affiliation: Institute for Space Research, Moscow 117997, Russia.
authors.forename: I
authors.initials: I
authors.lastname: Mitrofanov
authors.forename: D
authors.initials: D
authors.lastname: Anfimov
authors.forename: A
authors.initials: A
authors.lastname: Kozyrev
authors.forename: M
authors.initials: M
authors.lastname: Litvak
authors.forename: A
authors.initials: A
authors.lastname: Sanin
authors.forename: V
authors.initials: V
authors.lastname: Tret'yakov
authors.forename: A
authors.initials: A
authors.lastname: Krylov
authors.forename: V
authors.initials: V
authors.lastname: Shvetsov
authors.forename: W
authors.initials: W
authors.lastname: Boynton
authors.forename: C
authors.initials: C
authors.lastname: Shinohara
authors.forename: D
authors.initials: D
authors.lastname: Hamara
authors.forename: R S
authors.initials: RS
authors.lastname: Saunders
mesh_terms: D001272:Atmosphere; D003359:Cosmic Radiation; D005118:Extraterrestrial Environment; D006859:Hydrogen; D007053:Ice; D018535:Mars; D008962:Models, Theoretical; D009502:Neutrons; D018531:Spacecraft; D013051:Spectrometry, Gamma; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D007053:Ice; D006859:Hydrogen