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| Ertürk, Emre |
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Andrianarijaona, V. M.
in Cooperation with on an Cooperation-Score of 37%
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Publications (4/4 displayed)
- 2017X-ray emission measurements following charge exchange between O8<SUP>+</SUP> and Kr
- 2017X-ray emission measurements following charge exchange between O8<SUP>+</SUP> and Kr
- 2015Radiance line ratios Ly-β/Ly-α, Ly-γ/Ly-α, Ly-δ/Ly-α, and Ly-ɛ/Ly-α for soft X-ray emissions following charge exchange between C<SUP>6+</SUP> and Krcitations
- 2013X-ray emission measurements following charge exchange between C<SUP>6+</SUP> and Hecitations
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document
X-ray emission measurements following charge exchange between O8<SUP>+</SUP> and Kr
Abstract
Lyman spectra and line-ratios for soft X-ray following charge exchange between O8<SUP>+</SUP> and Kr were measured using a beam-gas technique and a high resolution microcalorimeter X-ray detector for the collision velocities from 293 km/s to 1256 km/s. Ly- α, Ly- β, Ly- γ, Ly- δ, Ly- ∊ lines of O7<SUP>+</SUP> ion were identified, as well as minor transition lines from O6<SUP>+</SUP>. Our observed line ratios are compared to a single charge exchange model, specifically with theoretical calculations for O8<SUP>+</SUP> - H. Good agreement is found for the line ratio from the dominant n = 5 capture states, with direct capture and cascade having an important influence on the line ratio for the n = 4 states. Moreover, for velocities lower than 600 km /s, X-ray emission following autoionizing double capture results in Ly- α and Ly- β enhancement, the former leads to the Ly- ∊/Ly- α line ratios significantly smaller than theoretical calculations, the latter leads to the Ly- β/Ly- α line ratios larger than theory. The apparatus is being modified to perform measurements with H using a merged-beam technique. NASA Grant No. NNH13ZDA001N and NNX13AF31G....