Steffen Kühn

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physics.atom-ph2024

Hanle effect for lifetime determinations in the soft X-ray regime

Moto Togawa, Jan Richter, Chintan Shah +16

By exciting a series of $1 s^{2}^{1} S_{0} \to 1 s n p^{1} P_{1}$ transitions in helium-like nitrogen ions with linearly polarized mono…

physics.atom-ph2024

High-accuracy Measurements of Core-excited Transitions in Light Li-like Ions

Moto Togawa, Steffen Kühn, Chintan Shah +11

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 $1 s (^{2} S) 2 s 2 p (^{3} P)^{2} P_{3/2}$ an…