Experiment
Title
Ion irradiation ($He^+$, $Ar^+$) of an Allende meteorite pellet probed by Raman spectroscopy
Reference
Brunetto, Rosario (2013): Ion irradiation ($He^+$, $Ar^+$) of an Allende meteorite pellet probed by Raman spectroscopy. Version 1. SSHADE/DAYSY (OSUG Data Center). Dataset/Spectral Data.
Database
Experimentalists
Type(s)
laboratory
Description
Raman spectra of pellet n°1 and n°2 of the Allende 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/mm2.
Variable(s)
irradiation dose
Number of spectra
9
Instrument
Thermo Fisher DXR
Sample holder
samples mounted horizontally on X-Y stage of microscope
Standard medium
vacuum
Spectral range type(s)
MIR, FIR
Valid spectral range(s)
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge
#1 200.0 - 3400.0 0.9642 4.0 1.0
Comments
Raman shift with respect to laser at 532 nm
Incidence angle(s)
0.0°
Emergence angle(s)
0.0°
Comments
Confocal measurement with a x50 objective at long working distance
Observation mode
averaged
Objective type
x50
Spots number
20
Image size
1.0 x 1.0 ${\mu}m$
Comments
We recorded Raman maps of the different areas (virgin and irradiated) on the pellets to better cope with surface heterogeneity issues
Date begin - end
2013-01-01 - 2013-12-31