Volume 139, Number 2, July 2022
|Number of page(s)||5|
|Published online||27 July 2022|
The spectral line asymmetry of the Doppler effect in relativistic plasmas
1 Department of Physics and LRPPS laboratory, University Kasdi Merbah - Ouargla, 30000, Algeria
2 Laboratoire MESTEL, Université de Ghardaia - BP 455, Ghardaia 47000, Algeria
(a) firstname.lastname@example.org (corresponding author)
Received: 20 August 2021
Accepted: 25 November 2021
In this work, we present a comparative study between the relativistic and non-relativistic Doppler effects on spectral line profiles in ultra-hot plasmas in a laboratory system. We have established an exact formula of the relativistic Doppler profile in ultra-high-temperature plasma that is not a Gaussian one (unlike the non-relativistic Doppler profile that is Gaussian). We have also derived a new FWHM (Full Width at Half Maximum) formula of the corresponding profile that is different from the non-relativistic FWHM (). We have also shown that, in the relativistic case, Doppler broadening exhibits an asymmetry of spectral line profile (non-Gaussian profile). To ensure the validity of our investigation, we have compared our theoretical calculation with the experimental results and found a good agreement.
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