Fig. 1. 2p photoelectron spectra arising from the single photoionization of initial state 2p⁶3p（²P_1/2）

Fig. 2. Same as Fig.1 but for the photoionization of initial state 2p⁶3p（²P_3/2）

Fig. 3. Same as Fig.1 but for the 2p⁶3p（²P_1/2）→ 2p⁵4p shake-up satellites

Fig. 4. Same as Fig.3 but for the 2p⁶3p（²P_3/2）→ 2p⁵4p shake-up satellites

Fig. 5. Theoretical 2p photoelectron spectra arising from the 2p⁶3p（²P_1/2，3/2）→ 2p⁵4p shake-up transitions

Fig. 6. Theoretical 2p main and satellite photoelectron spectra of sodium atoms