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    5. Issue 5

    • Fulltext

       

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      https://www.ias.ac.in/article/fulltext/pram/033/05/0000-0000

    • Keywords

       

      Two photon absorption; photoacoustic spectrum; overtone absorption

    • Abstract

       

      Absorption spectra of formaldehyde molecule in the gas phase have been recorded using photoacoustic (PA) technique with pulsed dye laser at various power levels. The spectral profiles at higher power levels are found to be different from that obtained at lower laser powers. Two photon absorption (TPA) is found to be responsible for the photoacoustic signal at higher laser power while the absorption at lower laser power level is attributed to one photon absorption (OPA) process. Probable assignments for the different transitions are given in this paper.

    • Author Affiliations

       

      A V Ravi Kumar1 G Padmaja1 V P N Nampoori1 C P G Vallabhan1

      1. Laser Division, Department of Physics, Cochin University of Science and Technology, Cochin - 682 022, India

    • Dates

       
      Published
      November 1989
      Manuscript received
      31 July 1989
      Manuscript revised
      31 August 1989

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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