Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 29: Poster Session: Cryogenic Particle Detectors and Cyotechnique
TT 29.2: Poster
Montag, 12. März 2018, 15:00–19:00, Poster B
MetroBeta: Beta Spectrometry with Metallic Magnetic Calorimeters in the Framework of the European Program of Ionizing Radiation Metrology — •Michael Paulsen1,3, Jörn Beyer1, Lina Bockhorn2, Christian Enss3, Daniel Györi3, Sebastian Kempf3, Karsten Kossert2, Martin Loidl4, Riham Mariam4, Ole Nähle2, Matias Rodrigues4, and Marco Schmidt1 — 1Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany — 2Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany — 3Kirchhoff-Institute for Physics, Heidelberg University, Germany — 4CEA, LIST, Laboratoire National Henri Becquerel, Saclay, France
MetroBeta is a European project that aims to improve the theoretical calculation and measurement of beta spectrum shapes. The project is part of a common European program of ionizing radiation metrology. The precise knowledge of beta spectrum shapes is required for measuring the activity of pure beta emitters, thus realizing the Becquerel unit for these nuclides. Metallic magnetic calorimeters (MMCs) with the beta emitter sample embedded in the absorber have proven to be among the best beta spectrometers. Four beta spectra will be measured: Sm-151 (Q = 76.3 keV), C-14 (Q = 156.5 keV), Tc-99 (Q = 293.8 keV), Cl-36 (Q = 709.5 keV). A crucial part of the research and development is concerned with source and absorber preparation techniques, which includes producing high quality nuclide samples that need to be integrated into the MMC absorbers.