Abstract
The cross sections of the photoionization and the electron impact-induced ionization of Yb atoms from the excited 6s6p(3 P 1) state are numerically calculated. Matrix elements are computed in multielectron relativistic and nonrelativistic approximations with allowance for the superposition of configurations and a relaxation effect. The radial part of the electron wavefunction in a continuous spectrum is calculated using the solutions to one-configuration Hartree-Fock and Dirac-Fock equations. The cross sections calculated by a relativistic method are compared to those for a nonrelativistic approximation. The ratios of the radiation reduced matrix elements and the phase shifts of the wavefunctions of a continuous spectrum calculated for the 6p ɛs and 6p → ɛd transitions are compared to the values obtained by approximating the experimental dependences of the angular distribution of photoelectrons for the photoionization by ultraviolet radiation from an oriented excited state.
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Original Russian Text © A.Yu. Elizarov, I.I. Tupitsyn, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2010, Vol. 137, No. 6, pp. 1043–1051.
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Elizarov, A.Y., Tupitsyn, I.I. Ionization of ytterbium atoms from an excited state. J. Exp. Theor. Phys. 110, 909–917 (2010). https://doi.org/10.1134/S1063776110060014
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DOI: https://doi.org/10.1134/S1063776110060014