Band
Title
4150.8 cm-1: 2ν1 of 12C18O in natural CO - phase alpha
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
1 stretching 12C18O CO 12C⁻≡ 18O⁺ no
Characteristics summary
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)
4150.8 ± 0.5 - 2.5 ± 0.1 gaussian 1.42 ± 0.02 1.65e-05 w 3.55 ± 0.2 1.5e-05 vvw 20.0
Label
1
Category
overtone vibration
Method
comparison with gas phase

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 no

Vibration modes

Label (type)
1 (stretching)       Bond: 12C⁻≡ 18O⁺

Temperature

Temperature
20.0 ± 2.0 K
Formation temperature
20.0 K
Method #1
spectrum fit
Fit function
Gaussian
Overlap
isolated
Peak
4150.8 ± 0.5 cm-1 (fit peak)
Evaluation
validated
Quality
A
Comments
position sensitive to the formation conditions of α-CO
FWHM
2.5 ± 0.1 cm-1 (fwhm)
Shape
gaussian
Evaluation
validated
Quality
A
Method
fit intensity
Absorption coefficient
1.42 ± 0.02 cm-1
Specific abs. coefficient
700 ± 15 cm-1
Relative intensity
1.65e-05 ± 3.0e-07
Strength
weak (w)
Evaluation
undefined
Quality
A
Method
width x peak intensity
Absorption coefficient
3.55 ± 0.2 cm-2
Specific abs. coefficient
1750 ± 100 cm-2
Relative intensity
1.5e-05 ± 1e-06
Strength
very very weak (vvw)
Evaluation
undefined
Quality
C