Relaxation effects in 2p photoionization of Ar isonuclear sequence
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The 2p photoionization cross sections of Ar, Ar6+ and Ar8+ have been investigated by the multiconfiguration Dirac-Fock method. Our results show excellent agreement with the previous measurements and calculations, the relaxation is not so important for inner subshells of neutral Ar and all subshells of Ar6+ and Ar8+ as generally accepted. In unrelaxed calculation, it is known that the inner-shell cross sections are essentially unchanged upon the presence or absence of outer electrons except for a shift in the corresponding thresholds. Specifically, the present results show that this is not entirely true, i.e., non-neglectable influence of the removal of outer electrons on the 2p cross sections is observed even when the relaxation effects are not considered, especially in energy region near the thresholds.
- 23.M.Y. Amusia, in Atomic Photoeffect (Plenum Press, New York, 1990), p. 201Google Scholar
- 24.I.P. Grant, Relativistic Quantum Theory of Atoms and Molecules: Theory and Computation (Springer, New York, 2007)Google Scholar
- 33.C.C. Sang, J.J. Wan, C.Z. Dong, X.B. Ding, J. Jiang, Acta Phys. Sin. 57, 2152 (2008) (in Chinese)Google Scholar
- 35.Y. Ralchenko, A.E. Kramida, J. Reader, NIST ASD Team 2010, NIST Atomic Spectra Database (version 4.0.1) (National Institute of Standards and Technology, Gaithersburg, MD, 2011), http://physics.nist.gov/asd