Sample
Name
Spherical particles of H2O ice (SPIPA-B type, 67 µm average diameter) intimately mixed with 30 wt.% Nacl particles (sieved to less than 100 µm). After electron irradiation at 5 keV and 1 µA.
Database
Experimentalists
Date
2020-06-16
Provider
Planetary Ice Laboratory, Space and Planetary Science division, Physics Institute, University of Bern
Sample made of spherical particles of H2O ice (SPIPA-B type, 67 µm average diameter) intimately mixed with 30 wt.% Nacl particles (sieved to less than 100 µm) after electron irradiation at 5 keV and 1 µA. The VIS reflectance spectrum is collected over the outlined Region of Interest (red line).
Physical characteristics
Thickness
9.0 $\pm$ 1.0 $mm$
Diameter
20.0 $mm$
Volume
2830.0 $mm^3$
Surface roughness
smooth
Substrate material
Aluminum sample holder covered by black aluminum tape
Temperature
90.0 $\pm$ 15.0 $K$
Time at T
2194.0 $\pm$ 600.0 $s$
Temperature max
120.0 $K$
Type
vacuum
Fluid temperature
90.0 $\pm$ 15.0 $K$
Fluid pressure
1.0e-08 $\pm$ 1.0e-09 $mbar$
Time at T, P, pH
2194.0 $\pm$ 600.0 $s$
Source
electron gun
Chronology
before spectrum
Irradiation time
15.0 $min$
Particle
Family
fundamental particles
Type
electrons
Energy
5.0 $keV.particle^{-1}$
Particle fluence
2.95e+16 $\pm$ 6500000000000000.0 $particle.m^{-2}$
Publications
Number
1
Layers
Title
Electron irradiation (15 min - 1 keV - 1 µA)

Precursors

Samples

Produced sample

Sample
Spherical particles of H2O ice (SPIPA-B type, 67 µm average diameter) intimately mixed with 30 wt.% Nacl particles (sieved to less than 100 µm). After electron irradiation at 5 keV and 1 µA. (this sample)
Processing steps
Step Chronology Date Type Process Changes
#1 after sample formation 2020-06-16 irradiation Bombardment by electrons producing crystal defects ("colour centers") Darkening and yellow coloration caused by the formation of colour centers.