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TT: Fachverband Tiefe Temperaturen

TT 67: Cryogenic Particle Detectors and Other Superconducting Electronics

TT 67.2: Vortrag

Freitag, 5. April 2019, 09:45–10:00, H4

Development of a Beta Spectrometry Setup using Metallic Magnetic Calorimeters — •Michael Paulsen^1,2, Jörn Beyer¹, Lina Bockhorn³, Christian Enss², Sebastian Kempf², Karsten Kossert³, Martin Loidl⁴, Riham Mariam⁴, Ole Nähle³, Philipp Ranitzsch³, and Matias Rodrigues⁴ — ¹Physikalisch-Technische Bundesanstalt, Berlin, Germany — ²Kirchhoff-Institute for Physics, Heidelberg University, Germany — ³Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany — ⁴CEA, LIST, Laboratoire National Henri Becquerel, Saclay, France

The precise knowledge of beta spectrum shapes is relevant in radionuclide metrology, e.g. when determining the activity of samples containing beta emitting isotopes, as well as in fundamental research or applications such as nuclear medicine. Employing Metallic Magnetic Calorimeters (MMCs) with the radionuclide sample embedded in a 4π absorber geometry has proven to be among the best beta spectrometers in terms of energy resolution, notably for low energy beta transitions. This presentation discusses a new MMC-based beta spectrometer that is being developed within the MetroBeta project that operates at temperatures < 20 mK. We present initial beta spectra measurements of Cl-36 (Emax = 709.5 keV) using the newly developed setup, including a discussion of the data acquisition and evaluation used.