The ionization of boron and the isoelectronic ions carbon 11, nitrogen III, and oxygen IV by electron impact

Electron impact ionization of boron, carbon II, Nitrogen III, and oxygen IV, in their ground state configuration 1s 2 2s 2 2p, is treated, where allowance is made for inner shell ionization. Partial wave cross sections were calculated using both the so called 'modified' coulomb Born and the coulomb Born exchange approximation. Comparison is made with the only existing results of Peach and Lotz.