Hot Molecular Oxygen (O2) - LIF:

Transition: Schumann-Runge bands: B3Su- - X3Sg- (0,9), (0,10), (0,11), (1,9), (1,10), (1,11), (2,10), (2,11), ... bands of hot molecular oxygen O2 (excitation wavelengths: see table below)

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

Excitation wavelength: 321,0 to 278,5 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 (0,12) band starting at 310,5 nm 310,5 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 (1,12) band starting at 304,0 nm 304,0 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 (0,11) band starting at 298,4 nm 298,4 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 (2,12) band starting at 298,0 nm 298,0 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 (3,12) band starting at 292,4 nm 292,4 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 (1,11) band starting at 292,4 nm 292,4 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 (0,10) band starting at 287,1 nm 287,1 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 (2,11) band starting at 286,9 nm 286,9 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 (3,11) band starting at 281,7 nm 281,7 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 (1,10) band starting at 281,5 nm 281,5 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 (0,9) band starting at 276,4 nm 276,4 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 (2,10) band starting at 276,3 nm 276,3 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 (3,10) band starting at 271,5 nm 271,5 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 (1,9) band starting at 271,2 nm 271,2 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: 190 to 605 nm, C2H2/O2 flamme, O2/C2H2 ratio > 1, Laser beam above cone

EES, point of measurement:

   center (center of the flame), laser above cone

Excitation wavelength:

   UV:  306,00 nm to 299,50 nm

   VIS: no VIS excitation

Emission wavelength:

   190 nm to 605 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 301,29 nm

   VIS: no VIS excitation

Detected signals:

   Rayleigh scattering: UV

   hot O2-LIF from Schumann-Runge bands:

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

   OH-LIF A-X / from A-X (0,0) excitation:

(starting at: 302,2 nm (0,0))

   OH-LIF A-X emissions:

(278 - 300 nm, 302 - 330 nm, 342 - 355 nm)

   Rayleigh and OH-LIF in 2nd order

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

Download MS Word file:

Download Davis file:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 9,0 / entrance slit:80 mm / sum of pulses: 50 / 

UV pulse energy: not measured

   

Grating: 100 lines/mm, UV and VIS excitation, Emissions: 190 to 605 nm

EES, point of measurement:

   center (center of the flame)

Excitation wavelength:

   UV:  300,00 nm to 274,00 nm

   VIS: 600,00 nm to 548,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

   190 nm to 605 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 283,38 nm

   VIS: 566,76 nm

   (UV and VIS simultaneously)

Detected signals:

   Rayleigh scattering: UV and VIS

   hot O2-LIF from Schumann-Runge bands:

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

   OH-LIF A-X / from A-X (1,0) and (2,1) excitations:

(starting at: 278,5 nm (1,0) and 287,4 nm (2,1))

   OH-LIF A-X emissions:

(261 - 270 nm, 278 - 300 nm, 302 - 333 nm, 342 - 359 nm, 405 nm)

   Rayleigh and OH-LIF in 2nd order

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

Download MS Word file:

Download Davis file:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 7,9 / entrance slit: 80 mm / sum of pulses: 20 / 

UV pulse energy: not measured

   

Grating: 100 lines/mm, UV and VIS excitation, Emissions: 190 to 605 nm, O2/H2 ratio > 1

EES, point of measurement:

   center (center of the flame)

Excitation wavelength:

   UV:  280,90 nm to 274,00 nm

   VIS: 561,80 nm to 548,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

   190 nm to 605 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 279,79 nm

   VIS: 558,58 nm

   (UV and VIS simultaneously)

Detected signals:

   Rayleigh scattering: UV and VIS

   hot O2-LIF from Schumann-Runge bands:

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

   OH-LIF A-X / from A-X (1,0) excitation:

(starting at: 278,5 nm (1,0))

   OH-LIF A-X emissions:

(261 - 270 nm, 278 - 300 nm, 302 - 333 nm, 342 - 359 nm)

   OH-LIF A-X / from A-X (2,0) excitation

   Rayleigh and OH-LIF in 2nd order

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

Download MS Word file:

Download Davis file:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 9,9 / entrance slit: 80 mm / sum of pulses: 50 / 

UV pulse energy: about 2,65 to ... mJ/pulse

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