4.3 Article

Muonic x-ray spectroscopy on implanted targets

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DOI: 10.1016/j.nimb.2023.05.036

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Muonic x-ray spectroscopy; Nuclear charge radii; High-fluence implantation

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Muonic x-ray spectroscopy is used to study the structure of atoms and nuclei by examining the energy levels of atomic orbitals. By utilizing implanted targets, it becomes possible to measure the absolute charge radii of long-lived radioactive isotopes that are otherwise difficult to obtain. This research provides valuable insight for laser spectroscopy with a high level of precision.
Muonic x-ray spectroscopy uses muons to obtain information about the structure of the atom and the nucleus. In muonic atoms, the energy levels of atomic orbitals are significantly more sensitive to the finite size correction. By probing these orbitals using x-ray spectroscopy, the nuclear size correction can be extracted, providing valuable input for laser spectroscopy in the form of absolute charge radii with a relative precision better than 10-3. Continuing on developments that allowed measurements on target quantities of about 5 & mu;g, we showed the feasibility of using implanted targets. In the future, this will allow the measurement of absolute charge radii of long-lived radioactive isotopes that are not available in sufficient enrichment or large quantities. In this contribution, we shall report on the target preparation, involving high-fluence implantation, and on the preliminary results of the muX experimental campaign.

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