Advancing towards cancer theragnostic by probing the 225Ac decay chain with ultra-high-resolution metallic magnetic calorimeter based detectors

To the best of our knowledge, this first MMC based X-ray and γ-spectrum of ²²⁵Ac demonstrates the detector's potential, as it enables the separate detection of most nuclides in the ²²⁵Ac decay chain (all except ²²¹Ra and ²¹⁷Rn) with high sensitivity, excellent energy resolution, and precise energy calibration, paving the way for key technological advancements in research and clinical applications in nuclear medicine.