• MEETA SAH

Abstract: In the previous review paper by the author, researches on Sommerfeld’s screening parameters right from their inception to mid-seventies were analyzed. A great deal of work has been done in this field after this period. It is pertinent to take account of all these works as the complete and reliable data on screening parameters plays a significant role in the study of x-ray satellites. Moreover, screening parameters give important information about the reliability or otherwise of the energy value data used for their calculation. In fact, these parameters have become an important tool in the analysis of formalism being used in developing a specific theory about spectral analysis. Some authors have theoretically resolved the spin doublet levels and obtained energy values of individual levels making use of Sommerfeld’s screening parameters and Sommerfeld - Dirac relativistic energy expression. In this review paper, researches on screening parameters not only for the spin doublets but for S1/2 and K levels are also covered.

: screening parameters, spin doublets, sigma_{1 }and sigma_{2 }, S1/2 and K levels, X-ray spectra, screening doublets, irregular doublets.

"STUDIES ON X-RAY SCREENING PARAMETERS: A REVIEW", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 6, page no.f484-f489, June-2021, Available :http://www.jetir.org/papers/JETIR2106769.pdf

"STUDIES ON X-RAY SCREENING PARAMETERS: A REVIEW", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 6, page no. ppf484-f489, June-2021, Available at : http://www.jetir.org/papers/JETIR2106769.pdf