. Author manuscript; available in PMC: 2020 Apr 3.

Published in final edited form as: Meteorit Planet Sci. 2019 Dec 19;55(2):326–351. doi: 10.1111/maps.13420

Table 3.

Hydrogen fluences calculated for B/C and H arrays (10¹⁶ atoms cm⁻²).

From ratios	B/C array		H array
Standard	¹H/¹²C	¹²C¹H/¹²C₂	¹H/¹²C	¹²C¹H/¹²C₂
Internal	1.634 ± 0.028	1.437 ± 0.052	0.551 ± 0.012	0.522 ± 0.010
External DOS	1.850 ± 0.098	1.642 ± 0.116	0.658 ± 0.016	0.593 ± 0.044
External B/C	—	—	0.582 ± 0.033	0.520 ± 0.053
External H	1.548 ± 0.074	1.446 ± 0.110	—	—
From cps/nA	B/C Array		H Array
Standard	¹H	¹²C¹H	¹H	¹²C¹H
Internal	1.637 ± 0.028	1.548 ± 0.026	0.567 ± 0.016	0.557 ± 0.021
External DOS	1.695 ± 0.081	1.495 ± 0.033	0.711 ± 0.045	0.686 ± 0.032
External B/C	—	—	0.696 ± 0.033	0.722 ± 0.033
External H	1.376 ± 0.084	1.243 ± 0.032	—	—

Listed errors are 2σ SDs of measured values. A systematic error of ±5% from the uncertainty in the water contents of standard apatites should be quadratically combined with these values.

Fluences have been corrected for backscattered ions based on SRIM simulations (4% for B/C, 2.64% for H).