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New measurement resolves key astrophysical Fe XVII oscillator strength problem
One of the most enduring and intensively studied problems of x-ray astronomy is the
disagreement of state-of-the art theory and observations for the intensity ratio of two Fe XVII …
disagreement of state-of-the art theory and observations for the intensity ratio of two Fe XVII …
High-precision transition energy measurements of neon-like Fe XVII ions
We improve by a factor of 4–20 the energy accuracy of the strongest soft X-ray transitions of
Fe xvii ions by resonantly exciting them in an electron beam ion trap with a monochromatic …
Fe xvii ions by resonantly exciting them in an electron beam ion trap with a monochromatic …
Hanle effect for lifetime determinations in the soft X-ray regime
By exciting a series of 1 s 2 S 0 1→ 1 snp P 1 1 transitions in heliumlike nitrogen ions with
linearly polarized monochromatic soft x rays at the Elettra facility, we found a change in the …
linearly polarized monochromatic soft x rays at the Elettra facility, we found a change in the …
Searching for the warm-hot intergalactic medium using XMM–Newton high-resolution X-ray spectra
The problem of missing baryons in the local universe remains an open question. One
proposed alternative is that at low redshifts missing baryons are in the form of the warm-hot …
proposed alternative is that at low redshifts missing baryons are in the form of the warm-hot …
The XSTAR atomic database
We describe the atomic database of the xstar spectral modeling code, summarizing the
systematic upgrades carried out in the past twenty years to enable the modeling of K-lines …
systematic upgrades carried out in the past twenty years to enable the modeling of K-lines …
Application of a metallic-magnetic calorimeter for high-resolution x-ray spectroscopy of Fe at an EBIT
MO Herdrich, D Hengstler, S Allgeier… - Journal of Physics B …, 2024 - iopscience.iop.org
In this work, we present an experiment conducted at the S-EBIT-I ion trap of GSI. It involved
the study of ion-electron collisions of Fe and Ba ions in various charge states with the …
the study of ion-electron collisions of Fe and Ba ions in various charge states with the …
High-accuracy measurements of core-excited transitions in light Li-like ions
The transition energies of the two 1 s core-excited soft x-ray lines (dubbed q and r) from 1 s 2
2 s 1 S 1/2 to the respective upper levels 1 s (2 S) 2 s 2 p (3 P) 2 P 3/2 and 2 P 1/2 of Li-like …
2 s 1 S 1/2 to the respective upper levels 1 s (2 S) 2 s 2 p (3 P) 2 P 3/2 and 2 P 1/2 of Li-like …
X-Ray Photoabsorption of Density-sensitive Metastable States in Ne VII, Fe XXII, and Fe XXIII
Metastable states of ions can be sufficiently populated in absorbing and emitting
astrophysical media, enabling spectroscopic plasma-density diagnostics. Long-lived states …
astrophysical media, enabling spectroscopic plasma-density diagnostics. Long-lived states …
A new benchmark of soft X-ray transition energies of , , and : paving a pathway towards ppm accuracy
A key requirement for the correct interpretation of high-resolution X-ray spectra is that
transition energies are known with high accuracy and precision. We investigate the K-shell …
transition energies are known with high accuracy and precision. We investigate the K-shell …
[HTML][HTML] Photoionization Cross-Sections of Carbon-Like N+ Near the K-Edge (390–440 eV)
High-resolution K-shell photoionization cross-sections for the C-like atomic nitrogen ion (N+)
are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The …
are reported in the 398 eV (31.15 Å) to 450 eV (27.55 Å) energy (wavelength) range. The …