Lessons learned from nuclear decay data measurements in the european metrology research programme 'MetroFission' (June 2013)

S. Pomme (1) , Martin Loidl (2) , E. García-Torano (3) , M. Marouli (1) , Cindy Le Bret (2) , M.T. Crespo (3) , J. Paepen (1) , Xavier Mougeot (2) , V. Jobbágy (1) , Matias Rodrigues (2) , R. van Ammel (1) , H. Stroh (1) , A. Luca (4)

1 IRMM - JRC Institute for Reference Materials and Measurements [Geel]
2 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)
3 CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
4 Horia Hulubei National Institute for Physics and Nuclear Engineering

Nuclear decay data measurements were performed in the frame of a EURAMET project. Two specific goals were addressed: (1) High-precision measurements of $^{238}$U alpha-particle emission probabilities and (2) experimental characterization of the shape of beta spectra using cryogenic detectors. In the paper, specific lessons learned from the metrological work are highlighted. This includes effects of source preparation on the quality of alpha and beta spectrometry, the influence of exchange effects on beta spectra and the use of a magnet system to eliminate coincidence effects by conversion electrons in alpha-particle spectra.

Mots clés: 238U alpha-particle emission probabilities; beta spectrometry; alpha spectrometry; Detectors; exchange effect; coincidence; Index Terms-alpha spectrometry; alpha-particle spectroscopy; source preparation; cryogenic detector; ionizing radiations; Magnetometers; magnet; beta-ray spectroscopy; nuclear decay data measurements; metrology; alpha-particle spectra; high-precision measurements; Energy resolution; beta spectra shape; Materials; Gold; Distortion measurement

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Instrumentations et Détecteurs [physics.ins-det]

S. Pomme, Martin Loidl, E. García-Torano, M. Marouli, Cindy Le Bret, et al.. Lessons learned from nuclear decay data measurements in the european metrology research programme 'MetroFission' (June 2013). 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA), Jun 2013, Marseille, France. pp.6727934, ⟨10.1109/ANIMMA.2013.6727934⟩. ⟨cea-01822351⟩