Table 1 Abundances (wt%) and densities of the lunar subsurface used in our calculations. These data were taken from the Lunar Neutron Probe Experiment borehole analysis by McKinney et al. (2006). *Read 4.174E-1 as 4.174x 10−1.
From: Neutron production in the lunar subsurface from alpha particles in galactic cosmic rays
Depth (cm) | 0–22 | 22–71 | 71–224 | >224 |
|---|---|---|---|---|
(Density (g/cm3)) | (1.76) | (2.11) | (1.78) | (1.79) |
Element | Â | Abundance (wt%) | Â | |
O | 4.174E-01* | 4.156E-01 | 4.230E-01 | 4.264E-01 |
Na | 2.923E-03 | 3.136E-03 | 3.075E-03 | 3.455E-03 |
Mg | 6.162E-02 | 6.026E-02 | 6.156E-02 | 6.091E-02 |
Al | 6.061E-02 | 5.977E-02 | 7.384E-02 | 7.550E-02 |
Si | 1.903E-01 | 1.896E-01 | 1.967E-01 | 2.022E-01 |
K | 7.262E-04 | 7.896E-04 | 9.201E-04 | 1.632E-03 |
Ca | 7.541E-02 | 7.668E-02 | 8.020E-02 | 7.707E-02 |
Ti | 5.144E-02 | 4.905E-02 | 3.380E-02 | 3.198E-02 |
Cr | 2.872E-03 | 3.090E-03 | 2.641E-03 | 2.545E-03 |
Mn | 1.764E-03 | 1.778E-03 | 1.519E-03 | 1.458E-03 |
Fe | 1.350E-01 | 1.403E-01 | 1.228E-01 | 1.169E-01 |
Sm | 8.334E-06 | 7.747E-06 | 7.343E-06 | 1.051E-05 |
Eu | 1.816E-06 | 1.782E-06 | 1.545E-06 | 1.700E-06 |
Gd | 1.100E-05 | 1.058E-05 | 9.818E-06 | 1.355E-05 |
Th | 9.449E-07 | 8.022E-07 | 1.382E-06 | 3.006E-06 |