Application of the Triple-to-Double Coincidence Ratio Method at National Institute of Standards and Technology for Absolute Standardization of Radionuclides by Liquid Scintillation Counting

机译：三次重合比方法在美国国家标准技术研究院液体闪烁计数绝对标准化放射性核素中的应用

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A new liquid scintillation spectrometer that uses the Triple-to-Double Coincidence Ratio (TDCR) method to experimentally determine counting efficiencies has been constructed at the NIST for the primary standardization of β- emitting nuclides. This technique permits the efficiencies of the detector to be determined without the need for standard efficiency tracing and is thus considered a quasi-absolute method. This paper describes the new TDCR system at NIST and presents results of tests aimed at assessing the its operating characteristics. The results indicate that the measured activites for previously calibrated solutions of ~3H (tritiated water) and ~(63)Ni agree with certified activity values to within 0.04 % and 0.2 %, respectively.

机译：美国国家标准技术研究所（NIST）建造了一种新的液体闪烁光谱仪，该光谱仪使用三重对重合比率（TDCR）方法来实验确定计数效率，以对β发射核素进行初步标准化。该技术无需标准效率跟踪即可确定检测器的效率，因此被认为是准绝对方法。本文介绍了NIST的新型TDCR系统，并提出了旨在评估其运行特性的测试结果。结果表明，〜3H（tri水）和〜（63）Ni的先前校准溶液的测量活性分别与经验证的活性值一致，分别在0.04％和0.2％之内。

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《American Chemical Society(ACS) National Meeting; 20020408-20020410; Orlando,FL; US》|2002年|P.76-87|共12页
会议地点 Orlando FL(US);Orlando FL(US)
作者
B. E. Zimmerman; R. Coklle; J. T. Cessna; R. Broda; P. Cassette;
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Ionizing Radiation Division, Physics Laboratory, National Institute of Standard and Technology, Gaithersburg, MD 20899-8462;

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正文语种 eng
中图分类核转变化学;
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机译：标准化放射性核素的三重对重合比率（TDCR）方法的综述。
2. Absolute activity measurement of the electron-capture-based radionuclides 139Ce, 125I, 192Ir and 65Zn by liquid scintillation coincidence counting. [J] . Van Wyngaardt WM, Simpson BR Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine . 2006,第10a11期

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机译：通过液体闪烁重合计数标准化/ sup 57 / Co

Application of the Triple-to-Double Coincidence Ratio Method at National Institute of Standards and Technology for Absolute Standardization of Radionuclides by Liquid Scintillation Counting

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