Muonic hydrogen, ground-state hyperfine splitting, detection system, MeV-energy X-rays, scintillation detectors.
Muonic hydrogen ($\mu$p) is a bound-state of a negative muon and a proton. Since a muon is 207 times heavier than an electron, the energy levels of $\mu$p are very sensitive to the nuclear structure. By means of laser spectroscopy, we are aiming at the measurement of the ground-state hyperfine splitting to extract the two-photon exchange contribution and the Zemach radius of the proton. This experiment is being conducted at Paul Scherrer Institute and it requires designing a detector system capable of measuring the MeV-energy X-rays produced by the muonic atoms. The variation of thin and thick scintillation detectors can be used to define energy cuts to distinguish between an electron and a high-Z material ($\mu$Z) X-ray.
Work is supported by SNF project $200021\_165854$ and ERC CoG. $\#725039$.