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^- (0,3), (0,4), (1,4), (1,5), (2,4), (2,5), ... bands of hot molecular oxygen O₂ (excitation wavelengths: see table below)

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

Excitation wavelength: 238,0 to 227,1 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 (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, …
B-X (2,5) band starting at 231,7 nm	231,7 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 (0,4) band starting at 231,1 nm	231,1 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 (3,5) band starting at 228,3 nm	228,3 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 (1,4) band starting at 227,5 nm	227,5 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 (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, ...

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 195 to 230 nm

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

195 nm to 230 nm

EES, point of measurement:

center (inner range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

195 nm to 230 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 235,95 nm

VIS: 471,90 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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(starting at: 227 nm)

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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(starting at: 227 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:

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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: 230 to 265 nm

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

230 nm to 265 nm

EES, point of measurement:

center (inner range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

230 nm to 265 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 235,78 nm

VIS: 471,56 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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(260 nm, 248 nm, 237 nm)

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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(260 nm, 248 nm, 237 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:

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 4,2 to 3,5 mJ/pulse

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

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

265 nm to 300 nm

EES, point of measurement:

center (inner range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

265 nm to 300 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 235,78 nm

VIS: 471,56 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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(301 nm (weak), 286 nm, 272 nm)

Detected signals:

hot O2-LIF from Schumann-Runge bands:

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

NO-LIF A-X (weak) / from A-X (0,1) excitation

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:

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: 300 to 335 nm

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

300 nm to 335 nm

EES, point of measurement:

center (inner range of the flame)

Excitation wavelength:

UV: 237,25 nm to 232,75 nm

VIS: 474,50 nm to 465,50 nm

(UV and VIS simultaneously)

Emission wavelength:

300 nm to 335 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 235,78 nm

VIS: 471,56 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 (0,1) excitation:

(starting at 236,9 nm (0,1))

NO-LIF A-X emissions:

(301 nm (weak))

OH self emission (at about 310 nm)

Detected signals:

hot O2-LIF from Schumann-Runge bands:

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

OH self emission (at about 310 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:

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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