- Database
- Experimentalists
- Date
- 2013-01-01
- Provider
- IAS, Orsay
- Thickness
- 200.0 $\pm$ 100.0 ${\mu}m$
- Diameter
- 13000.0 ${\mu}m$
- Mass
- 0.1 $\pm$ 0.02 $g$
- Substrate material
- KBr
- Substrate comments
- KBr window, 2 mm thick, 13 mm diameter. The KBr is used as a substrate to avoid meteorite pellet break.
- Comments
- Pellet prepared by pressing (7 tons for 10 min) about 100 mg of the original dust (grain size 1–100 µm) on top of a KBr substrate pellet. The KBr is used as a substrate to avoid pellet break. Thickness of the meteorite pellet is large enough (>200 µm) to avoid contribution of KBr to the spectra.
Area D, irradiated with $3~10^{16}$ $He^+$ $cm^{-2}$
- Temperature
- 300.0 $\pm$ 5.0 $K$
- Temperature max
- 300.0 $\pm$ 5.0 $K$
- Type
- ambient air
- Fluid pressure
- 1.0 $mbar$
- Source
- ions accelerator
- Chronology
- before spectrum
- Comments
- Selected spectrum of the $3~10^{16}$ $He^+$.$cm^{-2}$ irradiated area, showing the most disordered (most irradiated) polyaromatic carbon (large D and G bands), thus representative of the irradiated layer (see Lantz et al., 2015, for details). We used ion currents in the 0.1–0.3 µA.$cm^{-2}$ range to avoid macroscopic heating of the samples.
- Family
- atoms and molecules
- Type
- atomic ions
- Particle
- $He^+$
- Energy
- 40.0 $keV.particle^{-1}$
- Particle fluence
- 3e+16 $particle.m^{-2}$
Particle
- Number
- 1
- Layers
-
- Pellet of Murchison powder , 200.0 ${\mu}m$
- Title
- Murchison pellet preparation
- Matters
- Sample
- Pellet of Murchison powder (n°2) (this sample)
- Processing steps
-
Step Chronology Date Type Process Changes #1 before layer formation 2013-01-01 mechanical pressing granular KBr to form the pellet substrate #2 during layer formation 2013-01-01 mechanical pressing Murchison powder on top of the KBr substrate (7 tons for 10 min)