- Type
- absorption
- Assignments summary
- Characteristics summary
| Assignment | Symmetry | Mode | Specie(s) | Molecule/Atom | Bond | Multiplicity | Degeneracy | Contribution | Resonance |
|---|---|---|---|---|---|---|---|---|---|
| 3ν3+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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11506 ± 2 | - | - | asymmetric high frequency wing | 0.0748 ± 0.0015 | 9.35e-06 | vvw | 30.0 | |||||
| 11511 ± 4 | - | - | asymmetric high frequency wing | 0.0534 ± 0.001 | vvw | 90.0 | 0.117 |
- Label
- 3ν3+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
- slightly blended
- Peak
- 11506 ± 2 cm-1 (peak)
- Evaluation
- validated
- Quality
- B
- Shape
- asymmetric high frequency wing
- Evaluation
- undefined
- Quality
- undefined
- Comments
- contribution of another mode as a high frequency shoulder around ~11540 cm-1
- Method
- peak intensity
- Absorption coefficient
- 0.0748 ± 0.0015 cm-1
- Relative intensity
- 9.35e-06 ± 1.875e-07
- Strength
- very very weak (vvw)
- 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
- slightly blended
- Peak
- 11511 ± 4 cm-1 (peak)
- Evaluation
- validated
- Quality
- C
- Shape
- asymmetric high frequency wing
- Evaluation
- undefined
- Quality
- undefined
- Comments
- contribution of other modes,around ~11540 and 11585 cm-1, as a high frequency wing
- Method
- peak intensity
- Absorption coefficient
- 0.0534 ± 0.001 cm-1
- Strength
- very very weak (vvw)
- Evaluation
- validated
- Quality
- A
- 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.