Show simple item record

Fourier transform spectroscopy of the O2 Herzberg bands. III. Absorption cross sections of the collision-induced bands and of the Herzberg continuum

dc.contributor.authorFally, S.
dc.contributor.authorVandaele, A.C.
dc.contributor.authorCarleer, M.
dc.contributor.authorHermans, C.
dc.contributor.authorJenouvrier, A.
dc.contributor.authorMérienne, M.-F.
dc.contributor.authorCoquart, B.
dc.contributor.authorColin, R.
dc.date2000
dc.date.accessioned2017-09-04T09:03:43Z
dc.date.available2017-09-04T09:03:43Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/6131
dc.descriptionAbsorption spectra of molecular oxygen were measured in the laboratory under temperature and pressure conditions prevailing in the Earth's atmosphere. Spectra of pure O2, O2+N2, and O2+Ar were recorded in the 41 700 to 33 000 cm-1 region (240-300 nm) at a maximal optical path difference of 0.45 cm using a Fourier transform spectrometer and a multiple reflection gas cell. The different components of the spectra, namely the discrete bands of the three Herzberg systems, the Herzberg continuum, and the collision-induced diffuse Wulf bands, were separated. The contribution of the Herzberg bands was first subtracted using the line parameters determined previously from high-resolution data. Spectra recorded at various pressures then made it possible to determine by linear regression the intensity of the Wulf bands and the Herzberg continuum. The characteristics of the Wulf bands have been investigated in details: vibrational analysis, pressure effect, foreign gas effect, and a simulated spectrum are reported. The Herzberg continuum cross section is determined below the dissociation limit. A comparison with literature data is given. The new O2 absorption cross sections and O2-O2 collision-induced absorption cross sections are useful in connection with atmospheric measurements of ozone and other trace gases in the UV spectral region.
dc.languageeng
dc.titleFourier transform spectroscopy of the O2 Herzberg bands. III. Absorption cross sections of the collision-induced bands and of the Herzberg continuum
dc.typeArticle
dc.audienceScientific
dc.subject.freeAbsorption spectroscopy
dc.subject.freeMolecular spectroscopy
dc.subject.freeMolecular vibrations
dc.subject.freePressure effects
dc.subject.freeRegression analysis
dc.subject.freeSpectrometers
dc.subject.freeThermal effects
dc.subject.freeFourier transform spectroscopy
dc.subject.freeHerzberg system
dc.subject.freeWulf band
dc.subject.freeOxygen
dc.source.titleJournal of molecular spectroscopy
dc.source.volume204
dc.source.issue1
dc.source.page10-20
Orfeo.peerreviewedYes
dc.identifier.doi10.1006/jmsp.2000.8204
dc.identifier.scopus2-s2.0-0034323398


Files in this item

Thumbnail
Name:
Fally(2000a).pdf
Size:
172.7Kb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record