Abstract
With a time-of-flight (TOF) ion analyzer combined with synchrotron radiation, total photoion-yield spectrum has been measured on isolated Mn atoms in the 2p → 3d excitation region (632 eV to 657 eV) with an estimated resolution 0.065 eV. The analysis of the observed spectrum was performed with the help of ab initio calculations of the excited states using the computer code GRASP92 for the MCDF calculation and of oscillator strengths for the excitation using the related REOS program. The calculations were performed for two outer-shell configuration cases: one considering the single reference-configuration 3dm4s2 and another with the multiple reference-configuration 3dm4s2 + 3dm + 14s + 3dm + 2 (m = 5 for the ground state and m = 6 for the 2p → 3d excited states). This two-step calculation showed the CI effect in the case of the excitation of a deep inner-shell.
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