Abstract
The cross sections and asymmetry parameters β of the 2p electron single photoionization, shake-up and shake-down processes from Na atoms in the ground state and in a number of excited states 2p6nl (n = 3, 4, 5 and l ≤ n–1) are calculated using a single channel relaxed-orbital Hartree–Fock approximation. A strong dependence of the calculated cross sections on the atomic orbit of the valence electron is found. The asymmetry parameters β are sensitive to the excitation of the valence electron near the threshold of photoionization. The single photoionization of the 2p subshell of Na atoms in the 4d 2D, 5p 2P and 5f 2F states is found to be about 43, 150 and 105 times less probable respectively than the shake-up process.
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