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<p>PTB has developed a new liquid scintillation counter for activity determination. The new system was designed to address the shortcomings of commercial devices when it comes to metrological scrutiny. It is equipped with three photomultiplier tubes and an automated sample changer. An external <sup>133</sup>Ba gamma-ray source is used to determine two types of quench indicating parameters for the CIEMAT/NIST efficiency tracing (CNET) method. Simultaneously, the counting data are also available for TDCR analysis. In this paper, findings from several test measurements are presented to demonstrate the performance of the new counter for TDCR and CNET applications. The results show that the new counter is significantly superior to its commercial counterparts, particularly when determining quench indicators.</p>

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A custom-built liquid scintillation counter for the simultaneous application of CIEMAT/NIST and TDCR methods

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月25日

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  • Karsten Kossert,
  • Hendrik Bauer,
  • Marcell Péter Takács,
  • Ole Nähle

摘要

PTB has developed a new liquid scintillation counter for activity determination. The new system was designed to address the shortcomings of commercial devices when it comes to metrological scrutiny. It is equipped with three photomultiplier tubes and an automated sample changer. An external 133Ba gamma-ray source is used to determine two types of quench indicating parameters for the CIEMAT/NIST efficiency tracing (CNET) method. Simultaneously, the counting data are also available for TDCR analysis. In this paper, findings from several test measurements are presented to demonstrate the performance of the new counter for TDCR and CNET applications. The results show that the new counter is significantly superior to its commercial counterparts, particularly when determining quench indicators.