Lessons Learned From Nuclear Decay Data Measurements in the European Metrology Research Programme ‘Metro Fission’

S. Pomme (1) , Martin Loidl (2) , E. García-Torano (3) , M. Marouli (1) , Cindy Le Bret (2) , M. 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: Gold; Spectroscopy; Energy resolution; Detector; magnet; source preparation; radionuclide metrology; spectrometry; Atmospheric measurements; Alpha spectrometry; cryogenics; coincidence techniques; cryogenic detector; exchange effect; coincidence; beta spectrometry; Particle measurements; Nuclear measurements; alpha-particle spectra; alpha-particle spectroscopy; beta-ray spectra; beta-ray spectroscopy; Index Terms-alpha spectrometry

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 ‘Metro Fission’. IEEE Transactions on Nuclear Science, 2014, 61 (4), pp.2066 - 2070. ⟨10.1109/TNS.2014.2317071⟩. ⟨hal-01862337⟩