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      https://www.ias.ac.in/article/fulltext/pram/033/05/0595-0602

    • Keywords

       

      Inelastic neutron scattering; phonon density of states; lattice dynamics; tetracyanoethylene

    • Abstract

       

      Inelastic neutron scattering experiments to determine phonon density of states of coherent scattering samples of polycrystalline complex solids are generally intensity-limited and therefore are feasible only at high flux facilities. Phonon density of states of the monoclinic phase of tetracyanoethylene at 300 K, obtained using the medium resolution triple axis spectrometer at the new Indian medium flux reactor Dhruva are reported here. The raw data is converted to the “neutron weighted” phonon density of states by applying suitable corrections. Comparison made with results from a theoretical calculation based on a semirigid molecule model of lattice dynamics is fair. Results from Dhruva are also consistent with that obtained (to be published) at the high flux pulsed neutron source (ISIS) of the Rutherford Appleton Laboratory in United Kingdom.

    • Author Affiliations

       

      S L Chaplot1 R Mukhopadhyay1 P R Vijayaraghavan1 A S Deshpande1 K R Rao1

      1. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
    • Dates

       
  • Pramana – Journal of Physics | News

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