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Testing Three-Body Quantum Electrodynamics with Trapped Ions: Evidence for a -dependent Divergence Between Experiment and Calculation
We report a new test of quantum electrodynamics (QED) for the w (1 s 2 p P 1 1→ 1 s 2 S 0
1) x-ray resonance line transition energy in heliumlike titanium. This measurement is one of …
1) x-ray resonance line transition energy in heliumlike titanium. This measurement is one of …
Helium-like titanium x-ray spectrum as a probe of QED computation
We discuss the first absolute energy measurements of the intercombination and forbidden
transitions ($ x, y, z $) in trapped Ti 20+ ions to 15 parts per million accuracy. We present …
transitions ($ x, y, z $) in trapped Ti 20+ ions to 15 parts per million accuracy. We present …
Measuring the linearity of X-ray detectors: consequences for absolute attenuation, scattering and absolute Bragg intensities
The linearity of response of X-ray detectors is tested. Examples of linearity tests demonstrate
the remarkable range of linear response of flowing-gas ion chambers in the synchrotron …
the remarkable range of linear response of flowing-gas ion chambers in the synchrotron …
Count‐rate, linearity, and performance of new backgammon detector technology
The meander wire backgammon technology has high levels of flux and spatial linearity
across a wide range of energies. One of the attractive features of these technologies is the …
across a wide range of energies. One of the attractive features of these technologies is the …
Recent developments in X-ray tests of quantum electrodynamics
Experimental tests of quantum electrodynamics (QED) have developed dramatically for
simple systems of hydrogen and helium, but there has also been significant progress for …
simple systems of hydrogen and helium, but there has also been significant progress for …
Optimisation of the spatial linearity in backgammon-type multi-wire gas proportional counters—The relevance of charge cloud distribution
The backgammon-type multi-wire gas proportional counter (MWPC) enables the detection of
X-ray photons in two dimensions with a high degree of spatial linearity. An accurate …
X-ray photons in two dimensions with a high degree of spatial linearity. An accurate …