Band
Title
1495.0 cm-1: ν4 of NH3 in natural NH3 - phase I
Band type
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν4 F deformation asym. NH3 NH3 NH3 mode degeneracy triple
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)
1486 ± 10 - - asymmetric high frequency wing m 20.0
1495 ± 5 - 30 ± 10 asymmetric high frequency wing 140 ± 50 0.003 m s 90.0
Band assignment #1
Assignment
Label
ν4
Symmetry
F
Category
fundamental vibration

Evaluation

Level
fully assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 mode degeneracy triple
Primary specie
NH3

Vibration modes

Label (type)
ν4 (deformation asym.)       Bond: NH3
Comments
F
Texture
film

Temperature

Temperature
20.0 ± 10.0 K
Method #1
spectrum measurement
Overlap
strongly blended
Peak
1486 ± 10 cm-1 (peak)
Evaluation
validated
Quality
D
Shape
asymmetric high frequency wing
Evaluation
undefined
Comments
with a broad shoulder around 1527 cm-1
Method
estimated
Strength
medium (m)
Evaluation
undefined
Texture
film

Temperature

Temperature
90.0 ± 15.0 K
Method #1
spectrum measurement
Overlap
strongly blended
Peak
1495 ± 5 cm-1 (peak)
Evaluation
validated
Quality
C
FWHM
30 ± 10 cm-1 (fwhm)
Shape
asymmetric high frequency wing
Evaluation
undefined
Quality
E
Comments
with a broad shoulder around 1527 cm-1
Method
baseline corrected peak intensity
Absorption coefficient
140 ± 50 cm-1
Relative intensity
0.003 ± 0.001
Strength
medium (m)
Evaluation
undefined
Quality
E
Method
estimated
Strength
strong (s)
Evaluation
undefined
Publications