While measurements of the hyperfine structure of hydrogen-like atoms are traditionally regarded as test of bound-state QED, we assume that theoretical QED predictions are accurate and discuss the information about the electromagnetic structure of protons that could be extracted from the experimental values of the ground state hyperfine splitting in hydrogen and muonic hydrogen. Using recent the...

The experimental data on muonic x-ray intensities for the third-row atoms (Z = 11-17) are analyzed in a unified way. The deduced initial/ distributions are not very far from the statistical ones; they are, however, somewhat steeper near the closed atomic shells and somewhat flatter in the middle of the shell. The K -electron refilling rate is fast increasing with Z; it is considerably smaller t...

The fully relativistic calculations of the self-energy correction to fine-structure levels heavy muonic atoms for ground and first excited states are presented. Additionally, nuclear-model dependence as well numerical convergence issues discussed.

A recent 15 parts per million (ppm) experiment on muonic hydrogen ( μ + − p ) found a major discrepancy with quantum electrodynamics (QED) and independent nuclear size determinations. Here we find a significant discrepancy in a different type of exotic atom: a medium-Z nucleus with two electrons. Investigation of the data collected is able to discriminate between available QED formulations and ...

Hyperfine splitting in Bi 82+ and Pb 81+ ions was calculated using continuum RPA approach with effective residual forces. To fix the parameters of the theory the nuclear magnetic dipole moments of two one-particle and two one-hole nuclei around 208 Pb were calculated using the same approach. The contribution from velocity dependent two-body spin-orbit residual interaction was calculated explici...

We describe a possible search for muonic radioactivity from lead nuclei using the base elements (“bricks” composed by lead and nuclear emulsion sheets) of the long-baseline OPERA neutrino experiment. We present the results of a Monte Carlo simulation concerning the expected event topologies and estimates of the background events. Using few bricks, we could reach a good sensitivity level.

The contribution of hadronic vacuum polarization to the hyperfine splitting of the muonic hydrogen ground state is calculated with the account of experimental data on the cross section of e+e− → annihilation into hadrons and the dipole parameterization of electromagnetic proton form factors.