Born and four-state calculations for the excitation of the (2p)43s and (2p)53p levels of neon by proton impact

For the singlet levels of (2p) 5 3s and (2p) 5 3p of the Ne atom wavefunctions of Hartree-Fock type are constructed. The Born calculations yield the new Bethe parameter b n =0.050 for the (2p) 5 3p states. A four-state impact parameter calculation is carried out including the states 1 S(2p) 6 , 1 S(2p) 5 3p and 1 P(2p) 5 3s (M=0,1). With this relatively simple model all known experimental data for the excitation of (2p) 5 3s and (2p) 5 3p by proton impact can be explained satisfactorily.