• The effect of longitudinal-transverse coupling and medium temperature on Cerenkov radiation

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      https://www.ias.ac.in/article/fulltext/pram/019/01/0013-0030

    • Keywords

       

      Dielectric medium; λ-σ coupling; temperature effect; response function; Cerenkov threshold; coherence

    • Abstract

       

      The effect of medium properties on the energy loss suffered by a relativistic charged particle in a dielectric medium generating Cerenkov radiation is discussed. Here we have taken into account the effect of the coupling of the longitudinal (σ) mode with the transverse (λ) mode in the electromagnetic interaction. Calculation shows that the inclusion of λ-σ coupling in the transverse interaction affects significantly the radiation output. However the modification of the radiation due to the thermal state of the system becomes important at very high temperatures such as one finds in astrophysical situations. This temperature effect is negligible at ordinary temperatures and thus is undetectable in laboratory experiments.

    • Author Affiliations

       

      D Nageswar Patro1

      1. Physical Research Laboratory, Ahmedabad - 380 009, India
    • Dates

       
  • Pramana – Journal of Physics | News

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