Dresden 2020 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 39: Focus Session: Frontiers in Cryogenic Particle Detection
TT 39.6: Talk
Wednesday, March 18, 2020, 17:45–18:00, HSZ 03
Beta Spectrometry Measurements with Metallic Magnetic Calorimeters — •Michael Paulsen1,2, Jörn Beyer1, Lina Bockhorn3,4, Christian Enss2, Sebastian Kempf2, Karsten Kossert4, Martin Loidl5, Riham Mariam5, Ole Nähle4, Matias Rodrigues5, and Philipp Ranitzsch1 — 1Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany — 2Kirchhoff-Institute for Physics, Heidelberg University, Germany — 3Institut für Festkörperphysik, Leibniz University, Hannover, Germany — 4Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany — 5CEA, LIST, Laboratoire National Henri Becquerel, Saclay, France
Precise measurements of beta spectra shapes are relevant in radionuclide metrology, e.g. when determining the activity of samples containing beta emitting isotopes and in fundamental research. Metallic Magnetic Calorimeters (MMCs) are energy-dispersive low-temperature detectors that are particularly suitable for beta spectrometry as they can be employed for wide energy ranges while having high energy resolution. We present beta spectra of 99Tc (Emax = 293.8 keV) and 36Cl (Emax = 709.5 keV) measured with MMC-based beta spectrometers along with a discussion of how systematic bremsstrahlung effects can be reduced for high energy spectra (Emax > 500 keV) using a dedicated absorber preparation or an unfolding algorithm.