TY - JOUR
T1 - Identifications of [equation presented] and [equation presented] EUV transitions of promethium-like Pt, Ir, Os and Re
AU - Bekker, H.
AU - Versolato, O. O.
AU - Windberger, A.
AU - Oreshkina, N. S.
AU - Schupp, R.
AU - Baumann, T. M.
AU - Harman, Z.
AU - Keitel, C. H.
AU - Schmidt, P. O.
AU - Ullrich, J.
AU - López-Urrutia, J. R.Crespo
PY - 2015/7/28
Y1 - 2015/7/28
N2 - We investigated Pm-, Nd-, and Pr-like spectra in the extreme ultra-violet region around 20 nm of Pt, Ir, Os, and Re (Z = 78-75) produced in the Heidelberg electron beam ion trap. Identification of the transitions was supported by several theoretical calculations, including collisional radiative modeling of the observed spectra. Special attention is given to the identifications of the alkaline-like - resonance lines in promethium-like highly charged ions. Previous identifications of these lines have been tentative at best due to disagreements with theory and doubts about the experimental charge state identifications. Our experimental results for the - wavelengths are accurate at the 0.005%-level. Understanding the level-structure of ions near the - level crossing is of particular importance for future searches of a possible fine-structure constant variation, and new optical clocks.
AB - We investigated Pm-, Nd-, and Pr-like spectra in the extreme ultra-violet region around 20 nm of Pt, Ir, Os, and Re (Z = 78-75) produced in the Heidelberg electron beam ion trap. Identification of the transitions was supported by several theoretical calculations, including collisional radiative modeling of the observed spectra. Special attention is given to the identifications of the alkaline-like - resonance lines in promethium-like highly charged ions. Previous identifications of these lines have been tentative at best due to disagreements with theory and doubts about the experimental charge state identifications. Our experimental results for the - wavelengths are accurate at the 0.005%-level. Understanding the level-structure of ions near the - level crossing is of particular importance for future searches of a possible fine-structure constant variation, and new optical clocks.
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U2 - 10.1088/0953-4075/48/14/144018
DO - 10.1088/0953-4075/48/14/144018
M3 - Article
AN - SCOPUS:84936817958
SN - 0953-4075
VL - 48
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
IS - 14
M1 - 144018
ER -