Dresden 2026 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 82: Cryogenic Detectors and Sensors

TT 82.2: Vortrag

Donnerstag, 12. März 2026, 15:15–15:30, HSZ/0103

High-Resolution Spectroscopy of Muon Induced X-ray Emission on a Prehistoric Human Tooth using Metallic Magnetic Calorimeters — •Hendrik Hadenfeldt, Andreas Abeln, Daniel Hengstler, Daniel Kreuzberger, Andreas Reifenberg, Daniel Unger, Andreas Fleischmann, Loredana Gastaldo, and Christian Enss — Kirchhoff-Institute for Physics, Heidelberg University, Germany

High-resolution X-ray spectroscopy of muonic atoms provides a powerful tool for probing nuclear and elemental properties. Muon-induced X-ray emission (MIXE), developed at the Paul-Scherrer-Institute (PSI), enables non-destructive elemental analysis. Using metallic magnetic calorimeters (MMCs), we aim to improve the precision of MIXE measurements of light muonic atoms. MMCs are low-temperature photon detectors operated at a few tens of mK. When a photon is absorbed, its energy causes an increase in the temperature of the absorber. This temperature increase leads to a change in magnetization of a paramagnetic Ag:Er sensor, which is then read out by SQUID magnetometers.

In this talk, a newly developed MMC detector setup for high-resolution muonic X-ray spectroscopy used during beamtime at PSI is presented. The detector achieved an unprecedented energy resolution of better than 50 eV full width at half maximum (FWHM) at photon energies around 120 keV. Data collected during measurements performed on a prehistoric human tooth have been analyzed to demonstrate the applicability of this detector technology to non-destructive elemental analysis.

Keywords: Metallic magnetic calorimeter; X-ray spectroscopy; Single photon detector; Muon-induced X-ray emission