Transition frequencies between 2S and 2P states of lithium-like ions

Eigenvalues and expectation values for the 1s22s 2S, 1s22p 2P, and 1s23d 2D states of lithium.

Proton structure from the measurement of 2S-2P transition frequencies of muonic hydrogen.

Accurate knowledge of the charge and Zemach radii of the proton is essential, not only for understanding its structure but also as input for tests of bound-state quantum electrodynamics and its predictions for the energy levels of hydrogen. These radii may be extracted from the laser spectroscopy of muonic hydrogen (μp, that is, a proton orbited by a muon). We measured the 2S(1/2)(F=0)-2P(3/2)(...

Theoretical lithium 2 2S-->2 2P and 2 2P-->3 2D oscillator strengths.

Photorecombination Studies of Lithium-Like Uranium Ions

During the last year detailed data analysis of previous photorecombination measurements with Li-like uranium U was performed. Photorecombination (PR) is the capture of a free electron under emission of one or more photons. In the independent processes approximation (IPA) PR usually is described to proceed either via a non-resonant direct pathway, radiative recombination (RR), or as a resonant t...

Angle-resolved photoelectron spectrometry studies of the autoionization of the 2s(2)2p 2P triply excited state of atomic lithium: experimental results and R-matrix calculations

We have measured the angle-resolved energy dependence of the electrons emitted over the energy range of the triply excited 2s(2)2p 2P lithium resonance using synchrotron radiation. We have also calculated the behavior of the angular distribution parameter beta using the R-matrix approximation. Experimental and theoretical results are in good agreement and show deep minima in the 1s2p (1, 3)P io...