Regional variations of neutron flux and search of Hydrogen enhanced areas at southern polar region of Moon from LEND/LRO instrument

Details Regional variations of neutron flux and search of Hydrogen enhanced areas at southern polar region of Moon from LEND/LRO instrument Regional variations of neutron flux and search of Hydrogen enhanced areas at southern polar region of Moon from LEND/LRO instrument

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.u22a..04l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #U22A-04

Physics

[5410] Planetary Sciences: Solid Surface Planets / Composition, [5462] Planetary Sciences: Solid Surface Planets / Polar Regions, [5464] Planetary Sciences: Solid Surface Planets / Remote Sensing

Scientific paper

The first results of neutron data analysis based on the measurements from Lunar Exploration Neutron Detector (LEND) onboard Lunar Reconnaissance Orbiter (LRO) are presented and discussed. LEND consists of set of neutron sensors measuring orbital neutron flux in wide energy range starting from thermal neutrons up to fast neutrons with energies more than 10 MeV. The most critical part of the instrument is four collimated neutron sensors providing high spatial resolution (footprint spot with radius ~ 5 km) which is significantly higher ones achieved in the previous lunar missions. It provides possibility of direct comparison between regional variations of neutron flux and distribution of polar shadow regions which are suspected to be possible reservoirs of relict water ice. The main efforts have been applied at the initial stages of the mission to study regional variations of neutron flux and compare distribution of neutron flux inside and outside polar shadow regions (PSRs), as well as to distinguish all detectable local polar regions with significant deficit of flux of epithermal neutrons without a priori assumption of their coincidence with PSRs. The first list of candidates of Neutron Deficite Regions (NDRs) for the south poles will be presented based on the first 3 months of LEND mapping data, and the content of hydrogen and/or water ice will be estimated for these candidates.

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