• Bound-free transitions and the dissociation limit

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    • Keywords


      Two-photon excitation; bound-free transitions; dissociation energy

    • Abstract


      Following a sequential two-photon excitation, fluorescence is observed from several selectively excited single rotational-vibrational energy levels of theE3π0g+ state of molecular iodine. The re-emittedEB fluorescence spectrum from each of the populated rovibrational level of theE state consists of a series of sharp lines terminating on the various discrete ro-vibrational levels of theB state and a few broad lines due to transitions taking place on to the continuum of theB state. The point of transition from sharp lines to broad features in the fluorescence spectrum has been utilized to determine theB state dissociation limit. This method of obtaining the dissociation limit of the molecular electronic states appears to be quite simple and straightforward.

    • Author Affiliations


      A K Ray1 S D Sharma1 G D Saksena1

      1. MDRS and Spectroscopy Division, Bhabha Atomic Research Centre, Trombay, Bombay - 400 085, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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