### Ion irradiation ($He^+$, $Ar^+$) of a Murchison meteorite pellets probed by Raman spectroscopy

Rosario Brunetto
Raman spectra of pellets 1 and 2 of the Murchison meteorite, with different irradiation spots on the surface. Raman micro-spectroscopy was performed at the SMIS beamline at SOLEIL using a DXR Raman micro-spectrometer from Thermo Fisher with a 532 nm exciting laser radiation, and a power on the sample lower than 0.3 mW, producing power densities lower than 300 $W/mm^2$.
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