Absorption of formaldehyde (H2CO) in the (A)over-tilde(1)A(2)

Research output: Contribution to journalArticle


The electronic A(1)A(2) <-- X(1)A(1) absorption spectra of formaldehyde vapour were studied at temperatures varying from 423 to 770 K with variable pressures from less than 0.1 to 1 MPa. Broadband vibronic and partially rotationally resolved 4(n)(1) rovibronic spectra of formaldehyde showed considerable sensitivity to temperature. The high resolution spectra showed collision-induced broadening as the pressure was increased. The results show that the absorption efficiency of the laser radiation front the third harmonic of Nd:YAG lasers is sensitive to the spectral properties of the laser, such as line position and shape. Promising results were obtained from the comparison between theoretical and measured absorption spectra.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics


  • fluorescence, laser-induced, temperature, pressure, formaldehyde, absorption
Original languageEnglish
Pages (from-to)821-828
JournalSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Issue number4
Publication statusPublished - 2004
Publication categoryResearch