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      https://www.ias.ac.in/article/fulltext/jcsc/115/03/0219-0224

    • Keywords

       

      TEA CO2 laser; carbon-13; isotope separation; low temperature

    • Abstract

       

      Multi-photon dissociation of Freon-22 (CF2HC1) at low temperatures has been carried out to separate the C-13 isotope using a TEA CO2 laser. Yield and enrichment of C-13 isotope in the product C2F4 are studied at 9P(22) laser line as a function of temperature (−50°C to 30°C). It is observed that at a given fluence when the temperature is lowered the yield decreases and the enrichment factor of C-13 increases.

      Room temperature irradiation of CF2HC1 towards the blue edge of C-13 absorption (i.e. at 9P(20) laser line) gives low yield of the product (C2F4) at a fluence, which produces the desired enrichment factor of 100. An increase in fluence gives very high yield of C2F4 but the enrichment factor is very low. Irradiating CF2HC1 at a temperature of −10°C enhances the enrichment factor to 100 and the yield obtained is comparable to that towards the red edge of C-13 absorption (i.e. at 9P(26) laser line).

      At a given enrichment factor higher enrichment efficiency is achieved when CF2HC1 is irradiated at lower temperature.

    • Author Affiliations

       

      Manoj Kumar1 Anant Deshpande2 Chintan Gupta1 A K Nath1

      1. Centre for Advanced Technology, Indore - 452 013, India
      2. Devi Ahilya Vishwavidyalaya, Indore - 452 001, India
    • Dates

       
  • Journal of Chemical Sciences | News

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