Photoion spectroscopy on isolated Mn atoms in the 2p 3d excitation region. II. Decay processes of the excited states

A series of time-of-flight (TOF) spectra of isolated Mn atoms were measured in the vicinity of 2p 3d excitation states (635 to 656 eV) at a high-energy resolution. Synchrotron radiation was used as a light source. From this spectral data, charge-separated photoion-yield spectra and charge-state dist...

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Published inJournal of physics. B, Atomic, molecular, and optical physics Vol. 47; no. 21; pp. 215002 - 215008
Main Authors Nagata, T, Kawajiri, K, Kosugi, S, Suzuki, N, Kemmotsu, M, Nandi, T, Sokell, E, Koike, F, Azuma, Y
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 14.11.2014
Institute of Physics
Subjects
Atomic and molecular physics
Atomic properties and interactions with photons
Auger cascading
Auger effect and inner-shell excitation or ionization
Auger process
Exact sciences and technology
inner-shell excited state
manganese atom
photoexcitation
Photoionization of atoms and ions
Photon interactions with atoms
Physics
Auger effect
Energy levels
Photoionization
Ionization
Distribution function
Time-of-flight method
Electronic transition
Excitation
Excited states
Charge distribution
Synchrotron radiation
Distribution functions
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Summary:A series of time-of-flight (TOF) spectra of isolated Mn atoms were measured in the vicinity of 2p 3d excitation states (635 to 656 eV) at a high-energy resolution. Synchrotron radiation was used as a light source. From this spectral data, charge-separated photoion-yield spectra and charge-state distribution as functions of the photon energy were obtained. The photoions resulting from the 2p 3d excitation states are distributed from Mn+ to Mn6+, with the largest component being Mn3+ ions. Based on these spectra, the relaxation processes of the 2p 3d excitation states are semi-quantitatively considered. For this purpose, highly excited states above the next ionization limit were calculated using the GRASP92 atomic code. It is found that single and double Auger shake-off processes play a central role in the formation of Mn5+ and Mn6+ ions. From the behavior of the charge-state distribution, the lowest 2p ionization limit has been determined to be 647.0 ± 0.3 eV.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/47/21/215002