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Source:
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IUP, MolSpec Lab, Serdyuchenko A., Gorshelev V, Weber M., Chehade W., Burrows JP;
Submitted to the JQSRT on 25.07.2012:
High spectral resolution ozone absorption cross-sections: Part I. Measurements and Analysis
High spectral resolution ozone absorption cross-sections: Part II.Temperature dependence
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Spectrometer:
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Echelle Spectrometer ESA 4000 and Bruker HR 120 FTS
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Resolution (FWHM):
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0.02 nm below 290 nm
1 cm-1 between 290 nm and 350 nm
0.02 nm between 350 nm and 450 nm
1 cm-1 between 450 nm and 1100 nm
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Grid:
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interpolated on grid 0.01 nm
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Cell:
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Double jacket quartz cell, thermo-insulated, pre-cooler, cryogenic cooling
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Absolute calibration:
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using pure ozone pressure
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Uncertainty for absolute measurements at 50 mbar and 193 - 293K and path length 270 cm:
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Systematic uncertainty
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Ozone impurity:
oxygen purity 99.995%
leaks <0.1%.
Accuracy of pressure sensors: 0.04% (0.02 mb)
Offset of the internal temperature sensors: <0.3-0.5% (1K)
Cell length: <0.07% (<1 mm)
Total: <0.5%, depending on temperature
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Statistical uncertainty
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Ozone decay <1%
Fluctuations of pressure: < 0.08% (<0.04mb)
Fluctuations of temperature: <0.1 - 0.16% (<0.3K)
Cooling efficiency: <0.3 - 1.6% (1-3K)
Source intensity drift and white noise 0.1 - 70%, depending on spectral region
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Concatenated spectra parameters:
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Spectral regions:
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Lightsource stability:
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Optical density limits:
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213–290 nm
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0.5%
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0.5-2
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290–310 nm
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2%
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0.1-2
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310–340 nm
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1%
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0.1-2
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340–450 nm
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1%
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0.05-1
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450–750 nm
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0.2%
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0.5-2
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750–1100 nm
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0.2%
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0.001-0.1
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column 1:
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vacuum wavelength (nm)
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column 2:
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cross section (cm2/molecule)
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293k
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column 3:
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cross section (cm2/molecule)
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283k
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column 4:
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cross section (cm2/molecule)
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273k
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column 5:
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cross section (cm2/molecule)
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263k
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column 6:
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cross section (cm2/molecule)
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253k
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column 7:
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cross section (cm2/molecule)
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243k
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column 8:
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cross section (cm2/molecule)
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233k
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column 9:
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cross section (cm2/molecule)
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223k
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column 10:
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cross section (cm2/molecule)
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213k
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column 11:
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cross section (cm2/molecule)
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203k
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column 12:
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cross section (cm2/molecule)
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193k
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