Pacific Northwest National Laboratory, 902 Battelle Blvd., Richland, WA, 99354, USA.
J Environ Radioact. 2023 Mar;258:107094. doi: 10.1016/j.jenvrad.2022.107094. Epub 2022 Dec 22.
A new algorithm (Xcounts) is introduced for estimating the activity concentrations of the xenon isotopes Xe, Xe, Xe, and Xe using beta-gamma coincidence data. The algorithm simultaneously estimates the decay counts associated with the four xenon isotopes, background, and radon in contrast to the net-counts method that uses sequential residual removal to account for background and interferences. Calibration data for background counts are determined from gas-background measurements and simulation. In Xcounts, the false positive count rates for Xe and Xe are lower than those for Xe and Xe. This algorithm appears to reliably detect the metastable isotopes at lower activity levels than the net-counts method and have similar performance for the other isotopes.
引入了一种新算法（Xcounts），用于使用β-γ符合数据估算氙同位素 Xe、Xe、Xe 和 Xe 的活度浓度。该算法同时估算与四个氙同位素、本底和氡相关的衰变计数，与使用顺序残差去除来解释本底和干扰的净计数方法不同。本底计数的校准数据由气体本底测量和模拟确定。在 Xcounts 中，Xe 和 Xe 的假阳性计数率低于 Xe 和 Xe 的计数率。与净计数方法相比，该算法似乎能够在更低的活度水平下可靠地检测亚稳态同位素，并且对其他同位素的性能相似。
