Mars Science Laboratory Alpha Particle X-ray spectrometer trace elements: Situational sensitivity to Co, Ni, Cu, Zn, Ga, Ge, and Br
| Autor: | R. Gellert, Albert S. Yen, N. I. Boyd, Scott VanBommel, J. A. Berger |
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| Rok vydání: | 2019 |
| Předmět: |
Martian
020301 aerospace & aeronautics Materials science Spectrometer Trace element Analytical chemistry Aerospace Engineering chemistry.chemical_element Germanium 02 engineering and technology Mars Exploration Program Alpha particle Alpha particle X-ray spectrometer 01 natural sciences 0203 mechanical engineering chemistry 0103 physical sciences Gallium 010303 astronomy & astrophysics |
| Zdroj: | Acta Astronautica. 165:32-42 |
| ISSN: | 0094-5765 |
| DOI: | 10.1016/j.actaastro.2019.08.026 |
| Popis: | Alongside major and minor elements, trace elements in Martian samples quantified through geochemical analyses by the Mars Science Laboratory (MSL, Curiosity) Alpha Particle X-ray Spectrometer (APXS) provide insight into ancient environments on Mars. APXS spectrum simulations facilitated the characterization of trace elements measured by the APXS under experimental situations commonly encountered on Mars. The precise quantification limits (PQL) obtained under ideal conditions are consistent with limits of detection in the literature and increase with degrading spectral quality. Major trace element species, such nickel, zinc, and bromine, with typical concentrations in the 100s of μg/g (or less), are quantifiable even with short (e.g., 20 min) early morning measurements between drives given the typical concentrations at the MSL site, Gale Crater. Target compositions currently in the public domain with major trace element species below the derived PQL specific to each measurement are noted. Quantification of copper, gallium, and germanium at 30 ppm and |
| Databáze: | OpenAIRE |
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