Excitation Emission Spectra for hot oxygen O2 in a H2/O2 flame

Hot Molecular Oxygen (O2) - LIF:

Transition: Schumann-Runge bands: B³S_u^- - X³S_g^- (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: 1200 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: 1200 lines/mm, UV and VIS excitation, Emissions: 230 to 265 nm, part 1

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 260,40 nm to 256,00 nm

VIS: 520,80 nm to 512,00 nm

(UV and VIS simultaneously)

Emission wavelength:

230 nm to 265 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 258,455 nm

VIS: 516,910 nm

(UV and VIS simultaneously)

Detected signals:

Rayleigh scattering: UV

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) excitation:

(starting at 259,5 nm (0,3))

NO-LIF A-X emissions:

(starting at: 260 nm, 248 nm, 237 nm)

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

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

OH-LIF A-X emissions:

(259 - 275 nm)

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: 1200 lines/mm, UV and VIS excitation, Emissions: 265 to 300 nm, part 1

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 260,40 nm to 256,00 nm

VIS: 520,80 nm to 512,00 nm

(UV and VIS simultaneously)

Emission wavelength:

265 nm to 300 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 258,455 nm

VIS: 516,910 nm

(UV and VIS simultaneously)

Detected signals:

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) excitation:

(starting at 259,5 nm (0,3))

NO-LIF A-X emissions:

(starting at: 286 nm, 272 nm)

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

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

OH-LIF A-X emissions:

(278 - 302 nm)

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 3,0 to ... mJ/pulse

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 205 to 240 nm, part 2

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 251,50 nm to 241,00 nm

VIS: 503,00 nm to 482,00 nm

(UV and VIS simultaneously)

Emission wavelength:

205 nm to 240 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 247,00 nm

VIS: 494,00 nm

(UV and VIS simultaneously)

Detected signals:

Rayleigh scattering: UV

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) and (1,3) excitations:

(starting at 247,8 nm (0,2) and 244,6 nm (1,3))

NO-LIF A-X emissions:

(starting at: 237 nm, 227 nm, 215 nm)

spectrograph error at about 249 nm ex. wavelength

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: 1200 lines/mm, UV and VIS excitation, Emissions: 240 to 275 nm, part 2

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 251,50 nm to 241,00 nm

VIS: 503,00 nm to 482,00 nm

(UV and VIS simultaneously)

Emission wavelength:

240 nm to 275 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 246,73 nm

VIS: 493,46 nm

(UV and VIS simultaneously)

Detected signals:

Rayleigh scattering: UV

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) and (1,3) excitations:

(starting at 247,8 nm (0,2) and 244,6 nm (1,3))

NO-LIF A-X emissions:

(272 nm, 260 nm, 248 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)

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: 1200 lines/mm, UV and VIS excitation, Emissions: 275 to 310 nm, part 2

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 251,50 nm to 241,00 nm

VIS: 503,00 nm to 482,00 nm

(UV and VIS simultaneously)

Emission wavelength:

275 nm to 310 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 246,73 nm

VIS: 493,46 nm

(UV and VIS simultaneously)

Detected signals:

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)excitations:

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

NO-LIF A-X emissions:

(286 nm)

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

(starting at: 243,2 nm (3,0))

OH-LIF A-X emissions:

(281 - 303 nm, 305 - ... nm)

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:

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: 1200 lines/mm, UV and VIS excitation, Emissions: 310 to 345 nm, part 2

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 251,50 nm to 241,00 nm

VIS: 503,00 nm to 482,00 nm

(UV and VIS simultaneously)

Emission wavelength:

310 nm to 345 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 247,585 nm

VIS: 495,170 nm

(UV and VIS simultaneously)

Detected signals:

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:

(305 - 330 nm)

OH self emission (weak)

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

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