Natural-linewidth measurements of the 3C and 3D soft-x-ray transitions in Ni XIX

Abstract

We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest $2p-3d$ transitions in neon-like Ni XIX ions, $[2p^6{]}_{J=0}\to [(2p^5{)}_{1/2}3d_{3/2}{]}_{J=1}$ and $[2p^6{]}_{J=0}\to [(2p^5{)}_{3/2}3d_{5/2}{]}_{J=1}$, respectively dubbed 3C and 3D, achieving a resolving power of 15\,000 and signal-to-background ratio of 30. We obtain their natural linewidths, with an accuracy of better than 10\%, as well as the oscillator-strength ratio $f(3C)/f(3D)$ = 2.51(11) from analysis of the resonant fluorescence spectra. These results agree with those of previous experiments, earlier predictions, and our own advanced calculations.

10 pages, 3 figures, 3 tables, published

References in corpus (8)

• On the use of C-stat in testing models for X-ray spectra
• The Heidelberg compact electron beam ion traps
• QED shifts in multivalent heavy ions
• Fe XVII X-ray Line Ratios for Accurate Astrophysical Plasma Diagnostics
• X-ray spectra of the Fe-L complex
• New Measurement Resolves Key Astrophysical Fe XVII Oscillator Strength Problem
• Astrophysical line diagnosis requires non-linear dynamical atomic modeling
• X-ray spectra of the Fe-L complex II: atomic data constraints from EBIT experiment and X-ray grating observations of Capella

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