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Measurement of the absolute gamma-ray emission intensities from the decay of $^{147}$Nd

Mark Kellett 1, * Laurent Vio 2 Christophe Bobin 1 Laurine Brondeau 1 Mikael Cardot-Martin 1 Hélène Isnard 2 Lacour Daniel 1 Marie-Christine Lépy 1 Valérie Lourenço 1 M. Marie 2 Cheick Thiam 1 
* Corresponding author
1 LNHB - Laboratoire National Henri Becquerel
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
2 LANIE - Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire
SEARS - Service d'études analytiques et de réactivité des surfaces : DEN/DPC
Abstract : The 2011 Decay Data Evaluation Project (DDEP) evaluation for $^{147}$Nd includes recommended absolute emission intensities for the two main gamma-rays at 91.105(2) keV and 531.016 (22) keV of 0.284(18) and 0.127(9) respectively, i.e. with uncertainties of 6.3% and 7.1%. Hence the LNE-LNHB has undertaken new absolute gamma-ray emission intensity measurements. The $^{147}$Nd source was produced at the TU Delft, Netherlands. The deposit was dissolved. To remove any possible impurities, a separation was undertaken using High Performance Liquid Chromatography directly coupled with an Inductively Coupled Plasma Mass Spectrometry. Absolute activity measurements were performed using two techniques before and after separation: the 4$\pi \beta \gamma$ coincidence method and the 4$\pi \gamma$ counting technique using a well-type NaI(Tl) detector. The gamma-ray intensities were measured before and after separation and give consistent results. The results of these measurements will be presented, along with a full uncertainty budget, and their effect on the recommended data uncertainties will be discussed.
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Submitted on : Monday, December 7, 2020 - 6:39:03 PM
Last modification on : Thursday, March 10, 2022 - 4:36:03 PM
Long-term archiving on: : Monday, March 8, 2021 - 8:11:34 PM


  • HAL Id : cea-03044618, version 1


Mark Kellett, Laurent Vio, Christophe Bobin, Laurine Brondeau, Mikael Cardot-Martin, et al.. Measurement of the absolute gamma-ray emission intensities from the decay of $^{147}$Nd. ICRM 2019 - 22nd International Conference on Radionuclide Metrology and its Applications, International Committee for Radionuclide Metrology (ICRM); University of Salamanca, May 2019, Salamanca, Spain. pp.53. ⟨cea-03044618⟩



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