0000000000292131

AUTHOR

Jordi Girones Lopez

showing 2 related works from this author

Field-portable Mössbauer spectroscopy on Earth, the Moon, Mars, and beyond

2011

ABSTRACT Iron occurs naturally as Fe 2+ , Fe 3+ , and, to a lesser extent, as Fe 0 . Many fundamental (bio)geochemical processes are based on redox cycling between these oxidation states. Mossbauer spectroscopy provides quantitative information about the distribution of Fe among its oxidation states, identification of Fe-bearing phases, and relative distribution of Fe among those phases. Portable, miniaturised Mossbauer spectrometers were developed for NASA9s Mars Exploration Rovers (in operation since 2004) and provide a means for non-destructive, in-situ field investigations. On Mars, these instruments provided evidence for aqueous activity with implications for habitability, were applied…

SpectrometerField (physics)MineralogyIn situ resource utilizationGeneral ChemistryMars Exploration ProgramExploration of MarsMeteoriteGeochemistry and PetrologyMössbauer spectroscopyGeneral Earth and Planetary SciencesGeologyEarth (classical element)General Environmental ScienceGeochemistry: Exploration, Environment, Analysis
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The miniaturised Mössbauer spectrometer MIMOS IIA: Increased sensitivity and new capability for elemental analysis

2010

The Miniaturised Mossbauer Spectrometers MIMOS II on board the two Mars Exploration Rovers (MER) have now been collecting valuable scientific data for more than five years. Mossbauer Spectrometers are part of two future missions: Phobos Grunt (Russian Space Agency) and a joint ESA—NASA Rover in 2018. The new advanced MIMOS IIA instrument described in this paper uses Silicon Drift Detectors (SDD) allowing also X-ray fluorescence chemical analysis (XRF) simultaneously to Mossbauer acquisitions. This paper highlights the features and technological improvements of the new spectrometer MIMOS IIA.

On boardPhysicsNuclear and High Energy PhysicsSilicon drift detectorSpectrometerElemental analysisMössbauer spectroscopyNondestructive analysisMars Exploration ProgramExploration of MarsInstrumentationRemote sensingNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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