The Sommerfeld screening parameter σ₁in X-ray spectra

A new method for the calculation of Sommerfeld screening parameter σ1 in x-ray spectra

“…It is interesting to compare the values of ½´Ä½ µ and ½´Ä¾ Ä ¿ µ with those obtained earlier by Gokhale and Misra [18,20]. Such a comparison is shown in table 4 which brings out the excellent agreement between the values of the screening constants reported in the present study and those published by Gokhale and Misra.…”

“…Gokhale and Misra [18] reported the results of their calculation of the values of ½ for a large number of spin doublet levels in various atomic number ranges. For their calculations they used the energy values given by Bearden and Burr [19] which were the most recent available at that time and the values of ¾ reported by Burr and Carson [17] which were free from series truncation errors.…”

“…Gokhale and Misra [18] in their calculation of screening parameter ½ eliminated the possible series of truncation errors by the use of the Sommerfeld energy expression in closed form. They also extended their calculation of ½ for Ë ½ ¾ levels [20].…”

“…56, No. 6, June 2001 Average values of 17.200 17.350 17.515 17.690 17.855 18.020 18.190 18.355 18.525 18.695 18.865 19.035 19.215 19.405 19.565 15.996 16.143 16.308 16.482 16.647 16.811 16.980 17.148 17.316 17.486 17.657 17.826 18.001 18.175 18.350 17.196 17.343 17.508 17.682 17.847 18.011 18.180 18.348 18.516 18.686 18.857 19.026 19.201 19.375 19.550 *Gokhale and Misra[18,20].…”

A method for the calculation of Sommerfeld's screening parameters σ1and σ2for experimentally unresolved spin doublets

“…Burr and Carson (1974) reported u2 values by using the experimentally observed spin doublet separations given by Bearden and Burr (1967). Gokhale and Misra (1977) reported u1 values for the same levels and atomic number ranges by using the u2 values of Burr and Carson (1974) and the experimental energy values tabulated by Bearden and Burr (1967). However these calculations do not cover the entire range of U , and u2 for all the elements due to the non-availability of experimental doublet separations for some elements and levels.…”