Extended Data Fig. 4: Representative full APT mass to charge state spectra and localized mass to charge state spectra highlighting the oxygen series mass to charge peaks. | Nature Astronomy

Extended Data Fig. 4: Representative full APT mass to charge state spectra and localized mass to charge state spectra highlighting the oxygen series mass to charge peaks.

From: Solar wind contributions to Earth’s oceans

Extended Data Fig. 4

Mass to charge state (Atomic mass/charge (u/Q)) spectra showing the histogram of the number of ion counts detected at each u/Q step. For each the mass-to charge state ratio spectra the detected ions were produced from regions of interest within: A) the sputter coated Cr layer from Extended Data Fig. 3J-L, B) the bulk olivine of Itokawa from Extended Data Fig. 3J-L, C) the solar wind irradiated rim of Itokawa olivine from Extended Data Fig. 3J-L, D) D-irradiated rim from Extended Data Figure 8H-N. (A–D) show the entire mass to charge state spectra from 0-150 u/Q. (E-H) show the APT mass to charge state between 16-21 u/Q that contains the Oxygen series peaks.

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