Poster Number 291
See more from this Division: Topical Sessions
See more from this Session: Real-Time, In-Field Geochemical Analysis: Current Capabilities and Future Prospects (Posters)
Abstract:
Mössbauer spectroscopy can determine the quantitative speciation of Fe among its oxidation and coordination states, and Fe-bearing mineral phases. The advanced MIMOS IIa is portable and set up in backscattering geometry, rendering sample preparation unnecessary. The instrument is further reduced in mass. It uses Silicon Drift Detectors (SDD) instead of Si-PIN diodes. The SDDs provide a higher energy resolution and as a result an approximately tenfold better signal-to-noise ratio. This decreases measurement times significantly from several hours down to 10s of minutes. The SDDs also allow for the acquisition of X-ray fluorescence spectra and therefore the investigation of elemental composition. For terrestrial applications, where mass is not such an issue, internal shielding can be added which makes the instrument with its 57Co source safer to handle in the field or in the lab.
See more from this Division: Topical Sessions
See more from this Session: Real-Time, In-Field Geochemical Analysis: Current Capabilities and Future Prospects (Posters)