Photoion spectroscopy on isolated Mn atoms in the 2p 3d excitation region: I. Total photoion-yield spectrum

• Published in: Journal of physics. B, Atomic, molecular, and optical physics Vol. 47; no. 18; pp. 185006 - 185012
• Main Authors: Nagata, T, Kawajiri, K, Kosugi, S, Suzuki, N, Kemmotsu, M, Nandi, T, Sokell, E, Azuma, Y, Koike, F
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 28.09.2014; Institute of Physics
• Subjects: Ab initio calculations; Atomic and molecular physics; Atomic properties and interactions with photons; Calculations and mathematical techniques in atomic and molecular physics (excluding electron correlation calculations); Electronic structure of atoms, molecules and their ions: theory; Exact sciences and technology; inner-shell electron; Intensities and shapes of atomic spectral lines; manganese; Oscillator strengths, lifetimes, transition moments; photoexcitation; photoion spectroscopy; Photoionization of atoms and ions; Photon interactions with atoms; Physics; Inner-shell ionization; Ground states; Theoretical study; Time-of-flight method; Excited states; Photoionization; Transition energy; Oscillator strengths; Multiconfiguration approximation; Dirac-Fock theory; Ab initio calculations; Excitation; Synchrotron radiation; Manganese
• ISSN: 0953-4075; 1361-6455
• DOI: 10.1088/0953-4075/47/18/185006

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.