Nitrogen dissociation and its excitation/vibrational temperature with hydrogen admixture in 50 Hz DC discharge |
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Authors: | Humaira Latif Sadaf Jamil Rana Babar Shahzad Khan Sardar Sikandar Hayat |
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Institution: | 1. Department of Physics, GC Women University, Sialkot, Pakistan;2. Department of Physics, Hazara University, Mansehra, Pakistan |
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Abstract: | Trace rare gas optical emission spectroscopy (TRG-OES) is carried out to determine the excitation temperature, vibrational temperature, dissociation fraction and nitrogen (N) atom density in 50?Hz active screen cage nitrogen plasma, as a function of discharge parameters (current density and fill pressure) and hydrogen concentrations. The excitation temperature is determined from Ar–I emission lines and is found to increase with hydrogen mixing. In a similar fashion, the vibrational temperature of second positive system is determined and found to have increasing trend with hydrogen addition. The dissociation fraction increases with hydrogen concentration up to 40% H2 in the nitrogen plasma, so as the nitrogen atom density. |
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Keywords: | Diffusion nitrides radiation |
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