The theoretical study of singly and doubly resonances of photoionization of neon

For the excitation of a subshell 2s   electron of Ne, we investigate the autoionizing spectrum of 2s22p52s22p5P1/22ns,nd and 2s2p62s2p6S1/22np Rydberg series by means of R-matrix theory and QB method. We predict the autoionizing energy and width of four Rydberg series.