Skip to main content
. Author manuscript; available in PMC: 2017 Aug 8.
Published in final edited form as: Icarus. 2015 Jul 15;255:100–115. doi: 10.1016/j.icarus.2015.04.004

Table 1.

Uncollimated epithermal neutron detector (SETN) signal binned in local time.

Local time (24 h) SETN (cps) Integrated time (s) [H] (ppmw) WEH (wt%)
0:35 9.539 ± 0.007   1.23 × 106   6.7 ± 2.0   0.0060 ± 0.0018
2:35 9.530 ± 0.010   0.82 × 106   8.7 ± 2.6   0.0078 ± 0.0023
4:35 9.527 ± 0.011   0.99 × 106   9.4 ± 2.8   0.0084 ± 0.0025
6:35 9.507 ± 0.009   0.89 × 106 13.8 ± 2.4   0.0125 ± 0.0022 Apollo
8:35 9.522 ± 0.009   0.92 × 106 10.5 ± 2.4   0.0094 ± 0.0022 Apollo
10:35 9.550 ± 0.007   1.34 × 106   4.2 ± 2.0   0.0038 ± 0.0018
12:35 9.556 ± 0.007   1.19 × 106   2.9 ± 2.0   0.0026 ± 0.0018
14:35 9.571 ± 0.010   0.76 × 106 −0.4 ± 2.6 −0.0004 ± 0.0023
16:35 9.563 ± 0.011   0.92 × 106   1.3 ± 2.8   0.0012 ± 0.0025
18:35 9.572 ± 0.010   0.91 × 106 −0.7 ± 2.6 −0.0006 ± 0.0023
20:35 9.557 ± 0.010   0.99 × 106   2.7 ± 2.6   0.0024 ± 0.0023
22:35 9.553 ± 0.006   1.41 × 106   3.6 ± 1.9   0.0032 ± 0.0017
Mean 9.546 ± 0.002 12.37 × 106   5.2 ± 0.7   0.0046 ± 0.0006

Local time = midpoint of two-hour interval of local time on Moon.

“Apollo” indicates the local time intervals when Apollo astronauts were on the ground and collected samples.

Reference count rate = 9.569 ± 0.006 cps, uncertainty-weighted mean of maximum three two-hour intervals.