- Database
- Experimentalists
- Date
- 2017-10-17
- Mass
- 31.0327 $\pm$ 1.5001 $g$
- Sample changes
- $CO_2$ sublimation: sample thickness decreased before spectrum - possible increase of PAH concentration
- Substrate material
- aluminium
- Substrate comments
- cylindrical 48mm diameter, 20mm deep
- Comments
- sublimating sample with an initial thickness of 20 mm decreasing with time
- Temperature
- 173.0 $\pm$ 2.0 $K$
- Time at T
- 4.15 $\pm$ 0.4 $h$
- Comments
- spectrum takes about 25 min
- Type
- molecular gas
- Fluids
-
- $CO_2$ 100.0 %
- Fluid temperature
- 173.0 $\pm$ 2.0 $K$
- Fluid pressure
- 6.0 $\pm$ 0.5 $mbar$
- Source
- Quartz-Tungsten lamp
- Chronology
- before spectrum
- Irradiation time
- 20.0 $\pm$ 1.0 $min$
- Comments
- illuminate surface with halogen office lamp. Lamp-window distance is 24 cm
- Family
- photons
- Type
- Vis photons
- Radiant flux
- 55.0 $\pm$ 10.0 J.s-1.m-2
- Radiant fluence
- 66000.0 $\pm$ 15300.0 J.s-1.m-2
Particle
Radiance
- Number
- 1
- Layers
- Title
- preparation of a mixture of PAH and CO2 snow
- Matters
- Sample
- CO2 snow with 0.10% of a PAH mix (this sample)
- Processing steps
-
Step Chronology Date Type Process Changes #1 before layer formation mixing mixing a weighted amount of PAHs mix with CO2 ice in a liquid N2 cooled stainless steel bowl the final mixture of CO2 ice and PAH is weighted to determine the PAH mass fraction #2 before layer formation layer formation filling the liq N2 cooled cell with the PAHs/CO2 ice mixture, plus some manual densification and surface flattening flat homogeneous PAHs/CO2 ice mixture sample - Comments
- some very thin and very fine grained layer of water ice may condense on the sample during closure of the cryogenic cell