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^- (0,2), (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: 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 (2,4) 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: 1200 lines/mm, UV and VIS excitation, Emissions: 195 to 230 nm, O2/H2 ratio > 1

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

195 nm to 230 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

195 nm to 230 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 226,68 nm

VIS: 453,36 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 (0,0), (1,1), (2,2) excitations:

(starting at: 226,9 nm (0,0), 224,5 nm (1,1) and 222,2 nm (2,2))

NO-LIF A-X emissions:

(227 nm, 215 nm, 205 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 (0,0), (1,1) and (2,2) excitations

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

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CCD dynamic: 12 bit / CCD 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, O2/H2 ratio > 1

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

230 nm to 265 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

230 nm to 265 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 226,17 nm

VIS: 452,34 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 (0,0), (1,1)excitations:

(starting at: 226,9 nm (0,0) and 224,5 nm (1,1))

NO-LIF A-X emissions:

(260 nm, 248 nm, 237 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 (0,0), (1,1) excitations

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 / CCD gain: 9,9 / entrance slit: 80 mm / sum of pulses: 50 /

UV pulse energy: about 3,3 to ... mJ/pulse

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 265 to 300 nm, O2/H2 ratio > 1

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

265 nm to 300 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

265 nm to 300 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 226,04 nm

VIS: 452,08 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 (0,0), (1,1) excitations:

(starting at: 226,9 nm (0,0) and 224,5 nm (1,1))

NO-LIF A-X emissions:

(301 nm, 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 / from A-X (0,0), (1,1) excitations (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 / CCD gain: 9,9 / entrance slit: 80 mm / sum of pulses: 50 /

UV pulse energy: about 3,3 to ... mJ/pulse

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 300 to 330 nm, O2/H2 ratio > 1

EES, point of measurement:

off-center (outer range of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

300 nm to 330 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 227,00 nm to 215,50 nm

VIS: 454,00 nm to 431,00 nm

Emission wavelength:

300 nm to 330 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 226,04 nm

VIS: 452,08 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 (0,0) excitation:

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

NO-LIF A-X emissions:

(317 nm, 301 nm)

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

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 (0,0) excitation (weak)

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:

Download Davis file:

Download ASCII file:

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

UV pulse energy: about 3,3 to ... mJ/pulse

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