钆-153的液体闪烁效率、伽马射线发射强度及半衰期。
Liquid scintillation efficiencies, gamma-ray emission intensities, and half-life for Gd-153.
作者信息
Bergeron Denis E, Cessna Jeffrey T, Fitzgerald Ryan P, Hamad Gulakhshan, Laureano-Pérez Lizbeth, Pibida Leticia, Zimmerman Brian E
机构信息
Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899-8462, USA.
Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899-8462, USA.
出版信息
Appl Radiat Isot. 2024 Jan;203:111108. doi: 10.1016/j.apradiso.2023.111108. Epub 2023 Nov 9.
Gadolinium-153 was standardized for activity by live-timed anticoincidence counting and an ampoule was submitted to the international reference system (SIR). Absolute emission intensities for the main γ rays were determined with calibrated high-purity germanium (HPGe) and lithium-drifted silicon (Si(Li)) detectors. A revised decay scheme is indicated, with no probability of direct electron capture to the Eu ground state. Triple-to-double coincidence ratio (TDCR) efficiency curves indicate that the revised decay scheme is consistent with experiment. Half-life measurements agree with a previous NIST determination and show no sensitivity to chemical environment.
钆-153通过实时反符合计数进行活度标准化，且一支安瓿已提交至国际参考系统（SIR）。使用校准过的高纯锗（HPGe）探测器和锂漂移硅（Si(Li)）探测器测定了主要γ射线的绝对发射强度。给出了一个修订后的衰变方案，不存在直接电子俘获至铕基态的可能性。三重重合与双重重合比（TDCR）效率曲线表明修订后的衰变方案与实验结果一致。半衰期测量结果与美国国家标准与技术研究院（NIST）先前的测定结果相符，且未显示出对化学环境的敏感性。
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