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

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

Excitation wavelength: 215,6 to 210,0 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 (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, …
B-X (4,3) band starting at 211,1 nm	211,1 nm deg. to the red	192,4 nm, 198,4 nm, 204,6 nm, 211,1 nm, 217,9 nm, 225,1 nm, 232,7 nm, 240,6 nm, 249,0 nm, 257,8 nm, 267,0 nm, 276,9 nm, 287,2 nm, 298,2 nm, 309,8 nm, 322,2 nm, …
B-X (2,2) band starting at 210,0 nm	210,0 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 (0,1) band starting at 209,2 nm	209,2 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 (3,2) band starting at 207,2 nm	207,2 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 (1,1) band starting at 206,2 nm	206,2 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: 1200 lines/mm, UV and VIS excitation, Emissions: 190 to 225 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 215,70 nm to 209,72 nm

VIS: 431,40 nm to 419,44 nm

(UV and VIS simultaneously)

Emission wavelength:

190 nm to 225 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 214,56 nm

VIS: 429,12 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 (1,0), (2,1), (3,2) excitations:

(starting at 215,3 nm (1,0) and 214,0 nm (2,1))

NO-LIF A-X emissions:

(starting at: 225 nm, 215 nm, 205 nm, 196 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: 9,0 / entrance slit: 100 mm / sum of pulses: 50 /

UV pulse energy: not measured

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 225 to 260 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 215,70 nm to 209,72 nm

VIS: 431,40 nm to 419,44 nm

(UV and VIS simultaneously)

Emission wavelength:

225 nm to 260 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 215,24 nm

VIS: 430,48 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 (1,0), (2,1) excitations:

(starting at 215,3 nm (1,0) and 214,0 nm (2,1))

NO-LIF A-X emissions:

(starting at: 256 nm (259 nm), 245 nm (248 nm), (234 nm) (237 nm), (225 nm) (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:

Download ASCII file:

CCD dynamic: 12 bit / ICCD gain: 9,0 / entrance slit: 100 mm / sum of pulses: 50 /

UV pulse energy: not measured

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 260 to 295 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 215,70 nm to 209,72 nm

VIS: 431,40 nm to 419,44 nm

(UV and VIS simultaneously)

Emission wavelength:

260 nm to 295 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 215,24 nm

VIS: 430,48 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 (1,0) excitation:

(starting at 215,3 nm (1,0))

NO-LIF A-X emissions:

(starting at: 295 nm, 281 nm, 268 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: 9,0 / entrance slit: 100 mm / sum of pulses: 50 /

UV pulse energy: not measured

Grating: 1200 lines/mm, UV and VIS excitation, Emissions: 295 to 330 nm

EES, point of measurement:

center (center of the flame)

Excitation wavelength:

UV: 215,70 nm to 209,72 nm

VIS: 431,40 nm to 419,44 nm

(UV and VIS simultaneously)

Emission wavelength:

295 nm to 330 nm

Single Image:

local distribution of signals inside the flame

Excitation wavelength:

UV: 214,96 nm

VIS: 429,92 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 (1,0) excitation:

(starting at 215,3 nm (1,0))

NO-LIF A-X emissions:

(starting at: 327 nm, 311 nm, 295 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: 9,0 / entrance slit: 100 mm / sum of pulses: 50 /

UV pulse energy: not measured

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