Beta spectrometry with metallic magnetic calorimeters in the framework of the European EMPIR project MetroBeta
Résumé
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.
Mots clés
beta energy range
151Sm
14C
99Tc
metrology
ionizing radiation
radioactivity
beta-rays
spectrum analysis
beta spectra
pure beta emitter
Metallic magnetic calorimeter
calorimeter
cryogenic detector
detector
instrumentation
nuclear instrumentation
absorber
beta spectrometer
spectrometry
low-energy beta transition
Origine : Fichiers produits par l'(les) auteur(s)
licence : CC BY - Paternité
licence : CC BY - Paternité
