• Collision induced transitions of ammonia calculation of relaxation timesT1 andT2, line widths, line shifts, and the double resonance effect

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      https://www.ias.ac.in/article/fulltext/pram/020/06/0439-0449

    • Keywords

       

      Relaxation time; rotational energy transfer; molecular-collisions; line widths; collision induced shift; ammonia calculation; double resonance effect

    • Abstract

       

      The longitudinal relaxation timeT1 and the transverse relaxation timeT3 for the inversion levels of the NH3 molecule have been calculated for NH3 — NH3, NH3 — N2 and NH3 — H2 collisions. The ratioT2/T1 lies between 1 and 2 which agrees well with the experiment. The phase shift effect onT2 and on the collisioninduced line shift δω under the framework of the Mehrotra-Boggs theory have also been evaluated. The change in the line intensity ΔI/I, in four-level double resonance experiments was also calculated, and the significance of higher order interaction terms has been pointed out.

    • Author Affiliations

       

      K Tanaka1 J E Boggs2 S C Mehrotra3

      1. Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Fukuoka - Japan
      2. Department of Chemistry, University of Texas at Austin, Austin, Texas - 78712, USA
      3. Department of Physics, Marathwada University, University Campus, Aurangabad - 431 004, India
    • Dates

       
  • Pramana – Journal of Physics | News

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