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      https://www.ias.ac.in/article/fulltext/pram/046/02/0145-0151

    • Keywords

       

      Laser induced plasma; emission spectroscopy

    • Abstract

       

      Analysis of the emission bands of the CN molecules in the plasma generated from a graphite target irradiated with 1.06 µm radiation pulses from a Q-switched Nd:YAG laser has been done. Depending on the position of the sampled volume of the plasma plume, the intensity distribution in the emission spectra is found to change drastically. The vibrational temperature and population distribution in the different vibrational levels have been studied as function of distance from the target for different time delays with respect to the incidence of the laser pulse. The translational temperature calculated from time of flight is found to be higher than the observed vibrational temperature for CN molecules and the reason for this is explained.

    • Author Affiliations

       

      S S Harilal1 Riju C Issac1 C V Bindhu1 Geetha K Varier1 V P N Nampoori1 C P G Vallabhan1

      1. Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin - 682 022, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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