The gamma and X-ray emission intensities of ¹⁶⁹Er were determined using radionuclidically pure ¹⁶⁹Er. The activity of the ¹⁶⁹Er 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 ¹⁶⁹Er 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.

使用放射性纯¹⁶⁹ Er确定¹⁶⁹ Er的伽马和 X 射线发射强度。¹⁶⁹ Er 源的活性通过三倍重合比技术标准化。使用校准的高纯锗光谱仪进行了三个独立的测量以测量发射强度。使用蒙特卡罗方法计算效率并使用多个实验测量进行验证。与之前的评估相比，最终结果显示出很大的不确定性降低。¹⁶⁹ Er每次衰变的发射强度报告为109.8 keV 线的1.401(40).10 ^-5和 1.513(19).10 ^-6对于 118.2 keV 线。X 射线线获得的值与参考值存在很大差异。