A global lunar oxygen map (count/minute) was produced by the gamma-ray peak (Ey= 6129 keV) produced by the inelastic interaction between oxygen atoms and secondary neutrons produced on the lunar surface. An oxygen abundance map (wt%) should be created with a normalization procedure with Apollo return samples. Our oxygen map was produced by a gamma-ray peak analysis of oxygen using the Kaguya gamma-ray spectra of ten-degree data, after which a global oxygen map was generated with the IDL mapping tool. A five-degree oxygen map was regenerated from the ten-degree map using the MATLAB program. The oxygen distribution on the moon according to this map shows very little variation, identical to the results of the Apollo return sample data. The oxygen abundance (atomic %) for mare and highland regions are known to be 60.3±0.4 and 61.1±0.9 (atomic %), respectively.
Fig. 1. A global lunar oxygen map (a) Gamma-ray peak of oxygen 6,129 keV on the moon (b) Ten-degree global oxygen elemental map (count/minute) (c) Five-degree global oxygen elemental map (count/minute) (d) 3D ten-degree oxygen map of the moon (e) A He-3 elemental map was produced using the TiO2 data from Chandrayaan-1 M3 data and OMAT (optical maturity) from the Clementine data.