Hot Molecular Oxygen (O2) - LIF:

Transition: Schumann-Runge bands: B3Su- - X3Sg- (0,2), (0,3), (1,2), (1,3), (2,3), (2,4), ... bands of hot molecular oxygen O2 (excitation wavelengths: see table below)

Appearance of the Schumann-Runge system: Degraded to the red

Excitation wavelength: 227,1 to 215,6 nm (UV) 

Flame/Burner: hydrogen/oxygen (H2/O) flame of a welding torch

Grating of the spectrograph: 100 l/mm

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Table: Expected transitions/emissions (Herzberg, 1979)

Transitions of O2

Schumann-Runge bands

Excitation wavelength

 range [nm]

Emissions [nm] starting at:
B-X (2,4) band starting at 224,1 nm 224,1 nm deg. to the red 197,2 nm, 203,4 nm, 210,0 nm, 216,9 nm, 224,1 nm, 231,7 nm, 239,7 nm, 248,1 nm, 257,0 nm, 266,4 nm, 276,3 nm, 286,9 nm, 298,0 nm, 309,8 nm, 322,4 nm, 335,8 nm, …
B-X (0,3) band starting at 223,4 nm 223,4 nm deg. to the red 202,6 nm, 209,2 nm, 216,1 nm, 223,4 nm, 231,1 nm, 239,2 nm, 247,7 nm, 256,7 nm, 266,3 nm, 276,4 nm, 287,1 nm, 298,4 nm, 310,5 nm, 323,4 nm, 337,1 nm, 351,8 nm, ...
B-X (3,4) band starting at 220,9 nm 220,9 nm deg. to the red 194,7 nm, 200,8 nm, 207,2 nm, 213,9 nm, 220,9 nm, 228,3 nm, 236,1 nm, 244,2 nm, 252,8 nm, 261,9 nm, 271,5 nm, 281,7 nm, 292,4 nm, 303,8 nm, 315,9 nm, 328,7 nm, …
B-X (1,3) band starting at 220,0 nm 220,0 nm deg. to the red 199,8 nm, 206,2 nm, 213,0 nm, 220,0 nm, 227,5 nm, 235,3 nm, 243,6 nm, 252,3 nm, 261,5 nm, 271,2 nm, 281,5 nm, 292,4 nm, 304,0 nm, 316,4 nm, 329,5 nm, 343,5 nm, …
B-X (2,3) band starting at 216,9 nm 216,9 nm deg. to the red 197,2 nm, 203,4 nm, 210,0 nm, 216,9 nm, 224,1 nm, 231,7 nm, 239,7 nm, 248,1 nm, 257,0 nm, 266,4 nm, 276,3 nm, 286,9 nm, 298,0 nm, 309,8 nm, 322,4 nm, 335,8 nm, …
B-X (0,2) band starting at 216,1 nm 216,1 nm deg. to the red 202,6 nm, 209,2 nm, 216,1 nm, 223,4 nm, 231,1 nm, 239,2 nm, 247,7 nm, 256,7 nm, 266,3 nm, 276,4 nm, 287,1 nm, 298,4 nm, 310,5 nm, 323,4 nm, 337,1 nm, 351,8 nm, ...
B-X (3,3) band starting at 213,9 nm 213,9 nm deg. to the red 194,7 nm, 200,8 nm, 207,2 nm, 213,9 nm, 220,9 nm, 228,3 nm, 236,1 nm, 244,2 nm, 252,8 nm, 261,9 nm, 271,5 nm, 281,7 nm, 292,4 nm, 303,8 nm, 315,9 nm, 328,7 nm, …
B-X (1,2) band starting at 213,0 nm 213,0 nm deg. to the red 199,8 nm, 206,2 nm, 213,0 nm, 220,0 nm, 227,5 nm, 235,3 nm, 243,6 nm, 252,3 nm, 261,5 nm, 271,2 nm, 281,5 nm, 292,4 nm, 304,0 nm, 316,4 nm, 329,5 nm, 343,5 nm, …

Grating: 100 lines/mm, only UV excitation, Emissions: 185 to 600 nm, O2/H2 ratio > 1

EES, point of measurement:

   off-center (outer range of the flame)

Excitation wavelength:

   UV:  227,30 nm to 220,76 nm

   VIS: no VIS excitation 

Emission wavelength:

   185 nm to 600 nm

EES, point of measurement:

    center (center of the flame)

Excitation wavelength:

   UV:  227,30 nm to 220,76 nm

   VIS: no VIS excitation 

Emission wavelength:

   185 nm to 600 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 226,08 nm

   VIS: no VIS excitation 

Detected signals:

   Rayleigh scattering: UV (+ 2nd ord.)

   hot O2-LIF from Schumann-Runge bands:

(for more information see table on top of this page)

   NO-LIF A-X / from  A-X (0,0), (1,1)excitations:

(starting at: 226,9 nm (0,0))

   NO-LIF A-X emissions:

(272 nm, 260 nm, 248 nm, 237 nm, 227 nm)

   NO-LIF and hot O2-LIF in 2nd order

Detected signals:

   Rayleigh scattering: UV (+ 2nd ord.) + VIS

   hot O2-LIF from Schumann-Runge bands:

(for more information see table on top of this page)

   NO-LIF A-X / from  A-X (0,0) excitation (weak)

   NO-LIF and hot O2-LIF in 2nd order

   OH self emission (at about 310 nm) (weak)

Download common measurement report for detailed informations about flame, laser beam position, pulse energy, ICCD gain, etc: 

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Download Davis file:

Download ASCII file:

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CCD dynamic: 12 bit / CCD gain: 9,6 / entrance slit: 100 mm / sum of pulses: 50 /

UV pulse energy: about 4,4 to ... mJ/pulse

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