Global distribution of neutrons from Mars: results from Mars odyssey.
Global distributions of thermal, epithermal, and fast neutron fluxes have been mapped during late southern summer/northern winter using the Mars Odyssey Neutron Spectrometer. These fluxes are selectively sensitive to the vertical and lateral spatial distributions of H and CO2 in the uppermost meter of the martian surface. Poleward of +/-60 degrees latitude is terrain rich in hydrogen, probably H2O ice buried beneath tens of centimeter-thick hydrogen-poor soil. The central portion of the north polar cap is covered by a thick CO2 layer, as is the residual south polar cap. Portions of the low to middle latitudes indicate subsurface deposits of chemically and/or physically bound H2O and/or OH.
Feldman
W C
WC
Los Alamos National Laboratory, Los Alamos, NM 87545, USA. wfeldman@lanl.gov
Boynton
W V
WV
Tokar
R L
RL
Prettyman
T H
TH
Gasnault
O
O
Squyres
S W
SW
Elphic
R C
RC
Lawrence
D J
DJ
Lawson
S L
SL
Maurice
S
S
McKinney
G W
GW
Moore
K R
KR
Reedy
R C
RC
D004367:Dry Ice; D005118:Extraterrestrial Environment; D005720:Gamma Rays; D006859:Hydrogen; D007053:Ice; D018535:Mars; D009502:Neutrons; D018531:Spacecraft; D013051:Spectrometry, Gamma; D013057:Spectrum Analysis; D013696:Temperature; D014867:Water
D004367:Dry Ice; D007053:Ice; D014867:Water; D006859:Hydrogen