- Type
- absorption
- Assignments summary
- Characteristics summary
| Assignment | Symmetry | Mode | Specie(s) | Molecule/Atom | Bond | Multiplicity | Degeneracy | Contribution | Resonance |
|---|---|---|---|---|---|---|---|---|---|
| 2ν1+2ν4 | combination vibration | 12CH4 | CH4 |
≥ 12C-1H ≥ 12C-1H |
unknown |
| Peak position (cm-1) |
Center position (cm-1) |
Width (cm-1) |
Shape | Asymmetry factor | Peak intensity (cm-1) |
Peak intensity relative | Peak strength | Integrated intensity (cm-2) |
Integrated intensity relative | Integrated strength | Temperature (K) |
Pressure (bar) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8389 ± 1 | - | - | asymmetric | 0.887 ± 0.02 | 1.109e-04 | vw | 30.0 | |||||
| 8388 ± 3 | - | - | sharp shoulder | 0.4 ± 0.1 | vw | 90.0 | 0.117 |
- Label
- 2ν1+2ν4
- Category
- combination vibration
Evaluation
- Level
- fully assigned
- Evaluation
- validated
| # | Multiplicity type | Degeneracy | Other band |
|---|---|---|---|
| 1 | unknown |
- Primary specie
- 12CH4
- Texture
- crystal
- Temperature
- 30.0 ± 1.0 K
- Formation temperature
- 90.7 K
- Temperature max
- 90.7 K
Temperature
- Method #1
- spectrum measurement
- Overlap
- moderately blended
- Peak
- 8389 ± 1 cm-1 (peak)
- Evaluation
- validated
- Quality
- B
- Shape
- asymmetric
- Evaluation
- undefined
- Quality
- undefined
- Method
- peak intensity
- Absorption coefficient
- 0.887 ± 0.02 cm-1
- Relative intensity
- 1.109e-04 ± 2.5e-06
- Strength
- very weak (vw)
- Evaluation
- validated
- Quality
- B
- Texture
- crystal
- Temperature
- 90.0 ± 1.0 K
- Formation temperature
- 90.7 K
- Temperature max
- 90.7 K
Temperature
- Pressure
- 0.117 bar
- Comments
- Vapor pressure
Pressure
- Method #1
- spectrum measurement
- Overlap
- shoulder-tail
- Peak
- 8388 ± 3 cm-1 (other)
- Evaluation
- undefined
- Quality
- C
- Shape
- sharp shoulder
- Evaluation
- undefined
- Quality
- undefined
- Method
- extrapolated
- Absorption coefficient
- 0.4 ± 0.1 cm-1
- Strength
- very weak (vw)
- Evaluation
- undefined
- Quality
- E
- Publication
- SSHADE spectra
-
- Grundy, Will; Schmitt, Bernard (2001): Vis-NIR absorption coefficient spectrum of CH4 phase-I crystal at 30 K. Version 1. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data.
- Grundy, Will; Schmitt, Bernard (2001): Vis-NIR absorption coefficient spectrum of CH4 phase-I crystal at 90 K. Version 1. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data.