Soreq Nuclear Research Center, Yavne, 818000, Israel.
Soreq Nuclear Research Center, Yavne, 818000, Israel; Unit of Nuclear Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel.
Appl Radiat Isot. 2023 Sep;199:110891. doi: 10.1016/j.apradiso.2023.110891. Epub 2023 Jun 1.
The absolute intensity for the 803-keV γ ray of Po was evaluated by α-γ coincidence technique. A liquid sample with a known amount of Po embedded in scintillation fluid was measured in a coincidence-based system that comprises a Liquid Scintillator (LS) detector and a High-Purity Germanium (HPGe) detector. A photo-reflector assembly that contains the Po sample provides 100% efficiency for detecting the α particles. The combination between the HPGe and the LS detectors allows to reject non-coincident α-γ events while maintaining high resolution γ spectroscopy. Consequently, the faint 803-keV photopeak from Po could be observed in a background-free environment, and its intensity could be evaluated with good accuracy. Sample measurements were carried out over nine months to gather statistics and verify the reliability of the experimental procedure. The absolute intensity of the 803-keV line was found to be (1.22 ± 0.03) × 10, in excellent agreement with the adopted value in a recent data compilation and consistent with previous experimental works.
通过α-γ符合技术评估了 Po 的 803keVγ射线的绝对强度。将已知量的 Po 嵌入闪烁液的液体样品在基于符合的系统中进行测量，该系统包括液体闪烁体（LS）探测器和高纯锗（HPGe）探测器。包含 Po 样品的光反射器组件为探测α粒子提供了 100%的效率。HPGe 和 LS 探测器的组合允许在保持高分辨率γ能谱的同时排除非符合的α-γ事件。因此，可以在无本底环境中观察到来自 Po 的微弱 803keV 光峰，并可以很好地精确评估其强度。进行了九个月的样品测量以收集统计数据并验证实验程序的可靠性。发现 803keV 线的绝对强度为（1.22±0.03）×10，与最近的数据汇编中采用的值以及与以前的实验工作非常吻合。
