Birgit Weichelt
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View article: The helion charge radius from laser spectroscopy of muonic helium-3 ions
The helion charge radius from laser spectroscopy of muonic helium-3 ions Open
Hydrogen-like light muonic ions, in which one negative muon replaces all of the electrons, are extremely sensitive probes of nuclear structure. Using pulsed laser spectroscopy, we have measured three 2 S -2 P transitions in the muonic heli…
View article: The helion charge radius from laser spectroscopy of muonic helium-3 ions
The helion charge radius from laser spectroscopy of muonic helium-3 ions Open
Hydrogen-like light muonic ions, in which one negative muon replaces all the electrons, are extremely sensitive probes of nuclear structure, because the large muon mass increases tremendously the wave function overlap with the nucleus. Usi…
View article: Laser Spectroscopy of Muonic Atoms and Ions
Laser Spectroscopy of Muonic Atoms and Ions Open
Laser spectroscopy of the Lamb shift (2S-2P energy difference) in light muonic atoms or ions, in which one negative muon $μ^-$ is bound to a nucleus, has been performed. The measurements yield significantly improved values of the root-mean…
View article: The proton radius puzzle
The proton radius puzzle Open
High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-proton scattering and hydrogen spectroscopy. The status of th…
View article: Simple Yb:YAG femtosecond booster amplifier using divided-pulse amplification
Simple Yb:YAG femtosecond booster amplifier using divided-pulse amplification Open
A hybrid-system approach using a low-gain Yb:YAG single crystal booster amplifier behind a state-of-the-art industrial high-power femtosecond fiber system is studied to significantly increase the output pulse energy of the fiber amplifier.…
View article: Experiments towards resolving the proton charge radius puzzle
Experiments towards resolving the proton charge radius puzzle Open
\nWe review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy…