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首页> 外文期刊>Radiation Protection and Environment >APPLICATION OF LIQUID SCINTILLATION INCLUSION METHOD FOR THE SIMULTANEOUS DETERMINATION OF ALPHA AND BETA ACTIVITIES IN COMPOSITE SAMPLES
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APPLICATION OF LIQUID SCINTILLATION INCLUSION METHOD FOR THE SIMULTANEOUS DETERMINATION OF ALPHA AND BETA ACTIVITIES IN COMPOSITE SAMPLES

机译：液体闪烁夹杂法同时测定复合样品中的α和β活性

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摘要

Present work highlights liquid scintillation Automatic Efficiency Control (AEC) as a tool for simultaneous determination of gross α and β activities in composite samples. AEC which is in-built feature in Packard Tri-Carb 2900TR Liquid Scintillation Counter (LSC) provides automatic counting region adjustments for single and dual label samples according to the degree of quench present in sample. In the present study, α/β spiked composite samples were treated as dual label samples with a and P radio-nuclides as two distinct entities contributing to the gross activities and analyzed employing AEC technique. Instrument discriminator settings and regions of interest (ROI) were evaluated to determine optimum counting conditions for present technique. Three sets of pure alpha and pure beta standards simulating the activity concentrations of real samples in terms of α/β activity ratios were used to calibrate LSC. Calibration methodology for Packard Tri-Carb 2900TR LSC with respect to the above measurements using ~(241)Am, ~(36)CI calibration standards is explained in detail. The practicability and working performance of AEC technique was checked by the validation trials with spiked synthetic samples covering range of α/β activity ratios from 1:1 to 1:30 and 30:1.
机译：本工作着重介绍了液体闪烁自动效率控制（AEC）作为同时测定复合样品中总α和β活性的工具。 Packard Tri-Carb 2900TR液体闪烁计数器（LSC）内置的AEC功能可根据样品中的淬灭程度为单标签和双标签样品提供自动计数区域调整。在本研究中，将掺有α/β的复合样品作为双标记样品，其中a和P放射性核素是两个有助于总活性的不同实体，并采用AEC技术进行了分析。评估仪器鉴别器设置和关注区域（ROI），以确定本技术的最佳计数条件。使用三组分别根据α/β活性比模拟真实样品的活性浓度的纯α和纯β标准品来校准LSC。关于使用〜（241）Am，〜（36）CI校准标样的上述测量，Packard Tri-Carb 2900TR LSC的校准方法进行了详细说明。 AEC技术的实用性和工作性能通过加标合成样品（覆盖范围为1：1至1:30和30：1的α/β活性样品）的验证试验进行了检查。

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