Hot Molecular Oxygen (O2) - LIF:

Transition: Schumann-Runge bands: B3Su- - X3Sg- (0,5), (0,6), (0,7), (1,5), (1,6), (1,7), (2,6), (2,7), (2,8), ... bands of hot molecular oxygen O2 (excitation wavelengths: see table below)

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

Excitation wavelength: 259,0 to 238,0 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 (2,8) band starting at 257,0 nm 257,0 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 (0,7) band starting at 256,7 nm 256,7 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 (3,8) band starting at 252,8 nm 252,8 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 (1,7) band starting at 252,3 nm 252,3 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 (2,7) band starting at 248,1 nm 248,1 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 (0,6) band starting at 247,7 nm 247,7 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 (3,7) band starting at 244,2 nm 244,2 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 (1,6) band starting at 243,6 nm 243,6 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 (2,6) band starting at 239,7 nm 239,7 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 (0,5) band starting at 239,2 nm 239,2 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 (3,6) band starting at 236,1 nm 236,1 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 (1,5) band starting at 235,3 nm 235,3 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, UV and VIS excitation, Emissions: 190 to 605 nm, part 1

EES, point of measurement:

   center (center of the flame)

Excitation wavelength:

   UV:  260,40 nm to 252,50 nm

   VIS: 520,80 nm to 505,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

  190 nm to 605 nm

Single Image:

  local distribution of signals inside the flame

Excitation wavelength:

   UV: 258,28 nm

   VIS: 516,56 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)

   NO-LIF A-X / from A-X (0,3) and (1,4) excitations:

(starting at 259,5 nm (0,3) and 255,8 nm (1,4))

   NO-LIF A-X emissions:

(286 nm, 272 nm, 260 nm, 248 nm, 237 nm, 227 nm, 215 nm)

   OH-LIF A-X / from A-X (3,0) excitation:

(starting at: 244,3 nm (3,0))

   OH-LIF A-X emissions from (3,0):

(265 - 275 nm, 281 - 303 nm, 305 - 330 nm)

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

(starting at: 259,2 nm (2,0))

   OH-LIF A-X emissions from (2,0):

(259 - 275 nm, 278 - 302 nm, 302 - 335 nm)

   Rayleigh, NO-LIF, O2-LIF 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: 8,6 / entrance slit: 80 mm /sum of pulses: 50 /

UV pulse energy:  about 3,2 to 3,7 mJ/pulse

 

Grating: 100 lines/mm, UV and VIS excitation, Emissions: 190 to 605 nm, part 2

Laser beam 27 mm above torch, cone height: 10 mm

EES, point of measurement:

   center (center of the flame)

Excitation wavelength:

   UV:  253,00 nm to 243,00 nm

   VIS: 506,00 nm to 486,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

   190 nm to 605 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 244,78 nm

   VIS: 489,56 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 (3,0) and (4,1) excitations:

(starting at: 244,3 nm (3,0))

   OH-LIF A-X emissions:

(265 - 275 nm, 281 - 303 nm, 305 - 330 nm)

   Rayleigh, O2 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: not measured

   

Grating: 100 lines/mm, UV and VIS excitation, Emissions: 185 to 600 nm, part 3

Laser beam 27 mm above torch, cone height: 10 mm

EES, point of measurement:

   center (center of the flame)

   laser beam 27 mm above torch, cone height: 10 mm

Excitation wavelength:

   UV:  250,00 nm to 237,00 nm

   VIS: 500,00 nm to 474,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

   185 nm to600 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 247,57 nm

   VIS: 495,14 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 (3,0) excitation:

(starting at: 244,3 nm (3,0))

   OH-LIF A-X emissions:

(265 - 275 nm, 281 - 303 nm, 305 - 330 nm)

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

   Rayleigh, O2-LIF 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: not measured

 

Grating: 100 lines/mm, UV and VIS excitation, Emissions: 180 to 600 nm,

Laser beam 40 mm above torch, cone height: 20 mm

EES, point of measurement:

   center (center of the flame)

   laser beam 40 mm above torch, cone height: 20 mm

Excitation wavelength:

   UV:  251,00 nm to 242,00 nm

   VIS: 502,00 nm to 484,00 nm

   (UV and VIS simultaneously)

Emission wavelength:

   180 nm to 600 nm

Single Image:

   local distribution of signals inside the flame

Excitation wavelength:

   UV: 246,53 nm

   VIS: 493,06 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)

   NO-LIF A-X / from A-X (0,2) excitation:

(starting at 247,8 nm (0,2))

   NO-LIF A-X emissions:

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

   OH-LIF A-X / from A-X (3,0) excitation:

(starting at: 244,3 nm (3,0))

   OH-LIF A-X emissions:

(265 - 275 nm, 281 - 303 nm, 305 - 330 nm)

   Rayleigh, NO-LIF, O2-LIF 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: 9,7 / entrance slit: 50 mm /sum of pulses: 60 /

UV pulse energy: not measured

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