2014
DOI: 10.1088/0953-4075/47/11/115201
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K-shell photoionization of B-like oxygen (O3 +) ions: experiment and theory

Abstract: Absolute cross sections for the K-shell photoionization of boron-like (B-like) O 3+ ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/ E ≈5000 (≈110 meV, full width half maximum) was achieved with photon energy from 540 up to 600 eV. Several theoretical approaches, including R-matrix, multi-configuration Dirac-Fock and screening constant by unit nuclear charge were used to identify and ch… Show more

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Cited by 24 publications
(28 citation statements)
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“…The K-shell photoionization cross section of the neutral oxygen atom measured by Stolte et al [25,26] at the Advanced Light Source (ALS) gives a position for this line almost 0.8 eV lower than the energy deduced from Chandra observations [24], a difference distinctly outside the quoted uncertainties of both measurements. Similar disagreement was found between our previous measurements at SOLEIL and the Chandra and XMM Newton observations for the O 3+ ion [9]. We have taken special care in the present work of the energy calibration for the experimental spectra to verify if such discrepancies exist also for O + and O 2+ ions.…”
Section: Introductionsupporting
confidence: 85%
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“…The K-shell photoionization cross section of the neutral oxygen atom measured by Stolte et al [25,26] at the Advanced Light Source (ALS) gives a position for this line almost 0.8 eV lower than the energy deduced from Chandra observations [24], a difference distinctly outside the quoted uncertainties of both measurements. Similar disagreement was found between our previous measurements at SOLEIL and the Chandra and XMM Newton observations for the O 3+ ion [9]. We have taken special care in the present work of the energy calibration for the experimental spectra to verify if such discrepancies exist also for O + and O 2+ ions.…”
Section: Introductionsupporting
confidence: 85%
“…This work is a continuation of our previous study on the O 3+ ion [9]. As the ions were produced in an electron cyclotron resonance ion source (ECRIS), both ions in their respective ground and metastable states contributed to the experimental spectra.…”
Section: Introductionmentioning
confidence: 87%
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