- Title
- Vis/Near-IR absorption coefficients spectra of liquid CH4, solid CH4-II and CH4-I 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-II and CH4-I from 93 to 20 K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20130114_001
- Publications
- Associated band lists
- Database(s)
- Experimentalists
- 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
- Number of spectra
- 9
- 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
- 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 0.482131412701804 0.92 0.05
Definition: incidence and emergence angles are positive with origin at nadir. Emergence angle in transmission is larger than 90° (=180°-i).
- 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 0.482131412701804 0.92 0.05
Definition: incidence and emergence angles are positive with origin at nadir. Emergence angle in transmission is larger than 90° (=180°-i).
- 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 $mm$
- Date begin
- 2001-01-01
Versions
- Release date
- 2018-02-27 11:43:15 UTC+0000
- Version (Date)
- #1 (2018-02-27 11:43:15 UTC+0000, Updated: 2019-12-28 16:55:13 UTC+0000)