Determination of the gamma and X-ray emission intensities of erbium-169. (October 2021)

• Record Type: Journal Article
• Authors: Talip, Zeynep; Juget, Frédéric; Ulrich, Jiri; Nedjadi, Youcef; Buchillier, Thierry; Durán, M. Teresa; Bochud, François; Bailat, Claude; van der Meulen, Nicholas P.
• Is Part Of: Applied radiation and isotopes. Volume 176(2021)
• Publication Date: 2021-10
• Subjects: Erbium-169 -- Standardization -- Gamma-ray spectrometry -- Gamma-ray emission intensity -- X-ray emission intensity; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2021.109823
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: The gamma and X-ray emission intensities of 169 Er were determined using radionuclidically pure 169 Er. The activity of the 169 Er source was standardized by the triple-to-double-coincidence ratio technique. Three independent measurements were performed to measure the emission intensities using calibrated high-purity germanium spectrometers. The efficiencies were computed with the Monte Carlo method and validated using several experimental measurements. Final results present a large uncertainty reduction compared to previous evaluations. The emission intensities per decay of 169 Er are reported as 1.401(40).10 −5 for the 109.8 keV line and 1.513(19).10 −6 for the 118.2 keV line. The values obtained for the X-ray lines show large discrepancies with the reference values. Highlights: The 169 Er activity was standardized by the triple to double coincidence technique. The gamma-ray emission intensities of 169 Er were determined through three independent HPGe spectrometry measurements. Uncertainties were reduced to less than 3% ( k = 1).