DIRAC–FOCK TRANSITION ENERGIES AND RADIATIVE AND RADIATIONLESS TRANSITION PROBABILITIES FOR Ar9+ TO Ar16+ ION LEVELS WITH K-SHELL HOLES

Costa, Ana Maria Medeiros da; Martins, Maria Conceição; Parente, F.; Santos, J. P.; Indelicato, P.

doi:10.1006/adnd.2001.0869

Cited by 26 publications

(26 citation statements)

References 14 publications

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“…This assessment is based on the assumption that the rate coefficient for inner shell ionization remains quasi-constant (supported by Ref. [8]) during the mixing gas sweep. Combining the results with heavier and lighter gases it is concluded that the most likely explanation fitting both observations is that the gas mixing affects the density of argon (at constant feed rate), thus favoring the ion cooling explanation.…”

Section: -1mentioning

confidence: 99%

Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

Sakildien

Tarvainen

Kalvas

et al. 2018

AIP Conference Proceedings

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Section: -1mentioning

confidence: 99%

Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

Sakildien

Tarvainen

Kalvas

et al. 2018

AIP Conference Proceedings

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“…A description of the mechanism leading to this spectrum can be found in Refs. Costa et al (2001); Martins et al (2001Martins et al ( , 2009); Santos et al (2010Santos et al ( , 2008Santos et al ( , 2011. The magnetic dipole (M1) transition has a natural width several orders of magnitude smaller than any line ever measured with a DCS until now.…”

Section: Resultsmentioning

confidence: 97%

“…One consequence of the ion creation and excited level population mechanisms described in Refs. Costa et al (2001); Martins et al (2001Martins et al ( , 2009Santos et al (2010Santos et al ( , 2008Santos et al ( , 2011 is that the 1s2s 3 S 1 level in He-like ions is strongly populated. It is created by ionization of the Li-like ion ground state 1s 2 2s.…”

Section: Ecrismentioning

confidence: 97%

A vacuum double-crystal spectrometer for reference-free X-ray spectroscopy of highly charged ions

Amaro

Szabo²,

Schlesser³

et al. 2014

Radiation Physics and Chemistry

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We have built a vacuum double crystal spectrometer, which coupled to an electron-cyclotron resonance ion source, allows to measure low-energy x-ray transitions in highly-charged ions with accuracies of the order of a few parts per million. We describe in detail the instrument and its performances. Furthermore, we present a few spectra of transitions in Ar 14+ , Ar 15+ and Ar 16+ . We have developed an ab initio simulation code that allows us to obtain accurate line profiles. It can reproduce experimental spectra with unprecedented accuracy. The quality of the profiles allows the direct determination of line width.

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“…Continuum-state wave functions were obtained by solving the Dirac-Fock equations with the same atomic potential of the initial state, normalized to represent one ejected electron per unit energy. Radiationless rates were, however, calculated using the correct transition energies obtained in previous independent calculations of initial and final state wave functions and eigenvalues [37][38][39].…”

Section: A Relativistic Calculationsmentioning

confidence: 99%

Approaches for theoretical and experimental determinations ofK-shell decay rates and fluorescence yields in Ge

et al. 2014

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Fluorescence yields are one of the fundamental parameters in atomic physics and related areas. Despite the increase of experimental work in the last decade, to obtain values of K-shell fluorescence yields available data are scarce or outdated for many elements. The available theoretical results cannot fill the gap since quite often they are derived from semi-empirical calculations based on old models. This is the case of Ge that has many applications in science. In this work, we present the results of a collaboration between an experimental and a theoretical group to obtain the decay rates and fluorescence yields for Ge. The calculations were performed within the Dirac-Fock method, including relativistic and QED corrections, using a state-of-the-art approach. The experimental work was carried out at the SOLEIL synchrotron and the fluorescence yields were measured by two distinct methods: the reflection geometry method and the escape peak method. The results show a very good agreement between the experiment and theory (1.1%), well within the experimental uncertainty (2.4%).

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DIRAC–FOCK TRANSITION ENERGIES AND RADIATIVE AND RADIATIONLESS TRANSITION PROBABILITIES FOR Ar9+ TO Ar16+ ION LEVELS WITH K-SHELL HOLES

Cited by 26 publications

References 14 publications

Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

A vacuum double-crystal spectrometer for reference-free X-ray spectroscopy of highly charged ions

Approaches for theoretical and experimental determinations ofK-shell decay rates and fluorescence yields in Ge

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