Abstract
The aim of the European Metrology Research Project MetroBeta is to improve the knowledge of the shapes of beta spectra, both in terms of theoretical calculation and measurement. The precise knowledge of beta spectra is required for the activity standardisation of pure beta emitters. Metallic magnetic calorimeters (MMCs), a type of cryogenic detectors, with the beta emitter embedded in the absorber have proven to be among the best beta spectrometers, in particular for low-energy beta transitions. Within this project, new designs of MMCs optimized for five different beta energy ranges were developed and a new detector module was constructed. The beta spectra of 151Sm, 14C and 99Tc have been measured so far; additional measurements with 36Cl are under preparation. Improved theoretical calculation methods and complementary measurement techniques complete the project.
Highlights
There are several fields of research and application that request better knowledge of beta spectrum shapes and maximum beta energies
Within the European metrology project MetroBeta, developments of both Metallic magnetic calorimeters (MMCs) and source/absorber preparation techniques for beta spectrometry using MMCs with beta emitters embedded in the absorber have been conducted
The experimental spectra will be compared both with improved theoretical spectra calculated within the project, and with spectra obtained with complementary measurement techniques
Summary
There are several fields of research and application that request better knowledge of beta spectrum shapes and maximum beta energies. In the field of radionuclide metrology, precise data on beta spectra are essential for the calculation of the detection efficiency for absolute activity measurement of pure beta emitters, in particular by liquid scintillation counting (see, e.g., Kossert and Mougeot, 2015). They are a prerequisite for the realization of the activity unit Bq for these nuclides.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
