Following Electron Impact Excitations of Single Os, Pt, Hg, Pb and Po Atom L Subshells Ionization Cross Section Calculations by Using Lotz's Equation

L shell ionization cross section and Li, subshells ionization cross sections of Os, Pt, fig, Pb, Po atoms calculated. For each atom, ten different electron nnpacty energy values E-oi used. Calculations carried out by using nonrelativistic Lutz equation in Matlab. Ionization cross section values obtained for E0, values in the energy range of E Li <= E(oi <=)4E(Li) for each atom. Starting Almost from E-oi, E-Li(i = 1,2,3) values of the each subshell ionization threshold energy, ionization cross section are increasing rapidly with E-oi. For a fixed E-oi= 3. E-Li values, while Z increases from 7, = 76 to 7 = 84 ionization cross section are decrease. These results help to understand some results which obtained from other electron-sigle atom impact studies on sigma(Li) subshells.