双探头WIZARD22470型伽马计数仪定量性能研究

伽马计数仪是对微量放射性精确测量的主要仪器之一,仪器性能的准确性、实验操作的规范性与实验结果的可靠性、真实性密切相关.为了在使用之前对仪器性能进行系统研究,本研究利用三种正电子核素18 F、68 Ga和89 Zr对双探头WIZARD22470型伽马计数仪进行双探头探测效率、伽马计数检测限、检测稳定性,以及与放射性测量线...

Quantitative Assessment of the Dual-Probe WIZARD2 2470 Gamma Counter

Gamma counter is one of the most important instruments for precise quantitative assessment of the radioactivity. The accuracy of instrument performance and standardization of experimental operation are closely related to the reliability and authenticity of experimental results. In this study, three positron nuclides ¹⁸F, ⁶⁸Ga and ⁸⁹Zr were used to systematically evaluate the dual-probe detection efficiency, detection limit, stability and linear range on the dual-probe WIZARD2 2470 gamma counter. The results suggested that the two probes have the same detection efficiency, and the influence of the environmental background should be considered during the experiment. Good linearity relationship appeared between gamma count and radioactivity in the range of 1×10³-6×10⁶ min^-1, with excellent quantitative accuracy and stability. The quantitative method of the dual-probe WIZARD2 2470 gamma counter in this study is expected to provide a reference for the standardized use of similar instruments in other laboratories.