Experiment
Title
Vis/Near-IR absorption coefficients spectra of liquid CH4, solid CH4-I and CH4-II from 93 to 20 K
DOI
10.26302/SSHADE/EXPERIMENT_BS_20130114_001
Data reference
Grundy, Will; Schmitt, Bernard (2001): Vis/Near-IR absorption coefficients spectra of liquid CH4, solid CH4-I and CH4-II from 93 to 20 K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20130114_001
Publications
Type(s)
laboratory measurement
Description
Vis/Near-IR absorption coefficients spectra of liquid $CH_4$ at 93 K , solid $CH_4$-II from 90 K to 20 K, every 10 K, and solid $CH_4$-I at 20K
Variable(s)
temperature, sample phase
Variable comments
series of absorption coefficient spectra from experiments with 3 different sample thicknesses with cooling from 93K to 20K with phase changes: liquid CH4, CH4-I, CH4-II
Number of spectra
9
Instrument
Nicolet 800 – transmission Visible/red
Sample holder
Closed cells of variable thickness (0.1, 1, 10 mm) in UHV chamber
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
Vis
Valid spectral range(s)
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge
#1 7000.0 - 14100.0 0.482131412702 0.92 0.05
Observation geometry
direct
Observation mode
fixed angles
Illumination
Type of polarization
no
Observation
Type of polarization
no
Comments
possibly partly polarized beam by beamsplitter
Observation mode
single spot
Image size
2.5 x 2.5 $mm$
Spatial resolution
2.5 ${\pm}$ 0.5 $mm$
Instrument
Nicolet 800 – transmission Near-IR
Sample holder
Closed cells of variable thicknesses (0.1, 1, 10 mm) in UHV chamber
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
NIR
Valid spectral range(s)
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge
#1 2000.0 - 7000.0 0.482131412702 0.92 0.05
Observation geometry
direct
Observation mode
fixed angles
Illumination
Type of polarization
no
Observation
Type of polarization
no
Comments
possibly partly polarized beam by beamsplitter
Observation mode
single spot
Image size
2.5 x 2.5 $mm$
Spatial resolution
2.5 ${\pm}$ 0.5 $mm$
Variable type(s)
  • temperature
  • sample phase
Comments
series of absorption coefficient spectra from experiments with 3 different sample thicknesses with cooling from 93K to 20K with phase changes: liquid CH4, CH4-I, CH4-II
Date begin
2001-01-01

Versions

Release date
2018-02-27 11:43:15 UTC+0000
Version (Date)
#1 (2017-11-17 17:16:56 UTC+0000, Updated: 2019-11-02 10:11:07 UTC+0000)