Following Electron Impact Excitation of Single (N, O, F, Ne, Na, Mg, Al, Si) Atom L Subshells Ionization Cross Section Calculations by Using Lotz's Equation

L shell and L subshells ionization cross sections sigma(L) and sigma(Li) (i = 1, 2, 3) following electron impact on (N,O, F, Ne Na, Mg, Al, Si) atoms calculated. By using Lotz' equation for nonrelativistic cases in Matlab sigma(L) and sigma(Li) cross section values obtained for ten electron impact(E-o) values in the range of E-Li< 10E(Li)(but only for Na 8E(Li);) for each atom. Starting from E-o=E-Li(each subshell ionization threshold energy), sigma(L) and sigma(Li) are increasing rapidly with E-o. For a fixed E-o value(approximate to 3.E-Li), while Z value increases from 7 <= Z<14 sigma(L) and sigma(Li) decrease. Results show that for smaller values of E-o(close to E-Li), x-ray yields formation of L-i(i=1,2,3) subshells decreases while competing other yields are increase. Results may help to understand similar findings which obtained from other electron impact excitation of L shell sigma(L) and subshells sigma(Li) studies for single atoms.