High-quality medium-resolution gamma-ray spectra from certified reference uranium and plutonium materials

A collection of medium resolution gamma-ray spectra from well-characterized U and Pu certified reference materials CRM-171 (also known as SRM-969), CRM-271 and Harwell PIDIE standards has been recorded. The spectra were recorded using LaBr3(Ce) (2.0” x 0.5”) and CZT (500 mm3) detectors. Aiming to acquire the highest quality reference data, the spectra were measured for long acquisition times, ensuring very good counting statistics across potentially useful spectral intervals - up to 1 MeV for the CZT and up to 2.6 MeV for the LaBr3(Ce) detectors. The experimental setup assures that the measurement geometry is stable and reproducible, and the spectra have minimum influence from background radiation and pile-up effects. The spectra will complement the international database of reference gamma-ray spectra with high-quality data for medium resolution spectrometers, and feed phase I of the U/Pu isotopic inter-comparison exercise that is being jointly organized by the ESARDA NDA Working Group and IAEA.

ZSIGRAI Jozsef;  MUEHLEISEN Artur;  WEBER Anne-Laure;  FUNK Pierre;  BERLIZOV Andrey;  MINTCHEVA Juliana; 

2015-01-23

IAEA

JRC90315

https://conferences.iaea.org/indico/contributionDisplay.py?contribId=89&sessionId=38&confId=47,    https://publications.jrc.ec.europa.eu/repository/handle/JRC90315,