China Institute of Atomic Energy (CIAE), 102413, Beijing, China; National Institute of Metrology (NIM), 100029, Beijing, China.
National Institute of Metrology (NIM), 100029, Beijing, China.
Appl Radiat Isot. 2022 Oct;188:110398. doi: 10.1016/j.apradiso.2022.110398. Epub 2022 Aug 7.
A new 4πβ(LS)-γ digital coincidence counting (DCC) system has been developed at NIM. The system equipped with a triple-to-double coincidence ratio (TDCR) counter in the β-channel and a NaI(Tl) scintillation detector in the γ-channel. A dedicated DCC software was designed for off-line implementation of 4πβ(LS)-γ coincidence counting method. The software consists of three modules: software-based circuits module, dead-time and resolving-time correction module and efficiency extrapolation module, respectively. The performance of the newly developed 4πβ(LS)-γ DCC system was demonstrated by a comparison measurement of Co-60 solution with the conventional 4πβ(PC)-γ DCC system.
中国计量科学研究院（NIM）研制了一种新型的 4πβ(LS)-γ 数字符合计数（DCC）系统。该系统在 β 道配备了三对二符合甄别计数器（TDCR），在 γ 道配备了碘化钠（NaI(Tl)）闪烁探测器。同时，还开发了一套专用的 DCC 离线软件，用于实现 4πβ(LS)-γ 符合计数方法。该软件主要由三个模块组成：基于软件的电路模块、死时间和分辨时间修正模块以及效率外推模块。通过与传统的 4πβ(PC)-γ DCC 系统对 Co-60 溶液的对比测量，验证了新开发的 4πβ(LS)-γ DCC 系统的性能。
