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Stable Isotopes

Analysis of magnesium isotopes (LG-SIMS)

The simultaneous detection system available on the large-geometry SIMS provides key advantages for the analysis of Mg isotopes (optimized precision, better useful yield, higher analysis throughput...)  Its multicollector system is renowned for its field-proven reliability. Its five movable collector units cover a large mass range, from Lithium to Uranium isotopes, while its state-of-the-art detectors, Electron Multiplier or Faraday cup, provide excellent stability with low background.

Magnesium isotopic analysis in Olivine

Micrometer-scale, high-precision Magnesium (Mg) isotopic analyses provide essential information regarding the timing of early solar system events.
 
magnesium stable isotopeThe left-hand side graph shows that an excellent repeatability can be obtained for the δ25Mg and δ26Mg ratios measured in multicollection mode at very high mass resolution. 
A reproducibility of 0.2 - 0.3 permil (1δ) could be achieved, the same performance being obtained when increasing the mass resolution from MRP~5,000 to ~8,300.

This demonstrates that high precision can be routinely achieved in multicollection mode using very high mass resolution conditions.



Data courtesy of CRPG Nancy, France.


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