A low level liquid scintillation spectrometer with five counting modules for <ce:sup loc='pre'>14</ce:sup>C, <ce:sup loc='pre'>222</ce:sup>Rn and delayed coincidence measurements

Konrad Tudyka; Sebastian Mi?osz; Alicja Ustrzycka; Sebastian Barwinek; Wojciech Barwinek; Agata Walencik-?ata; Grzegorz Adamiec; Andrzej Bluszcz

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A low level liquid scintillation spectrometer with five counting modules for 14C, 222Rn and delayed coincidence measurements

机译：具有五个计数模块的低水平液体闪烁光谱仪，用于 14> 14 C， 222 RN并延迟巧合测量

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摘要

Abstract

This paper presents a low-level liquid scintillation counting spectrometer with five identical counting units that allow simultaneous measurements to be performed. The counting chambers are enclosed in high purity copper and lead shielding which significantly decreases the background count rate. Each of the five counting chambers is equipped with a high stability software-controllable power supply, and each counting module contains a signal analyzer that measures the pulse height, pulse shape and the time between subsequent pulses, returning all the data as a time-stamped sequence which enables the identification of pulse pairs. Such pulse pairs, arising from the decay of214Bi/214Po, provides a sensitive tool for222Rn contamination determination in low-level14C measurements. This enables radiocarbon dating or bio-component determination to be performed directly after liquid scintillator production without the risk of222Rn interfering with the measurement of14C.

Highlights

?LSC spectrometer has been developed that allows five simultaneous meas

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抽象

本文提出了一个低级液体闪烁计数计数谱仪，其中五个相同的计数单元允许进行同时进行测量。计数室封闭在高纯度铜和引线屏蔽中，这显着降低了背景计数率。五个计数室中的每一个都配备了高稳定性的软件可控电源，每个计数模块都包含一个信号分析仪，该信号分析仪测量脉冲高度，脉冲形状和随后脉冲之间的时间，将所有数据返回作为时间戳的所有数据能够识别脉冲对的序列。这种脉冲对由 214> 214> bi / 214 po，提供敏感 222> 222 rn污染确定在低级 14> 14 c测量。这使得可以直接在液体闪烁体产生之后直接进行的无线电碳约会或生物组分测定，而不会导致 222> 222 RN干扰 14> 14 c。

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？ LSC光谱仪已经开发出允许五个同时测量

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来源
《Radiation measurements》 |2017年第2017期|共6页
作者
Konrad Tudyka; Sebastian Mi?osz; Alicja Ustrzycka; Sebastian Barwinek; Wojciech Barwinek; Agata Walencik-?ata; Grzegorz Adamiec; Andrzej Bluszcz;
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作者单位

Department of Radioisotopes Institute of Physics - Centre for Science and Education Silesian University of Technology;

Department of Radioisotopes Institute of Physics - Centre for Science and Education Silesian University of Technology;

Department of Radioisotopes Institute of Physics - Centre for Science and Education Silesian University of Technology;

Institute of Measurement Science Electronics and Control - Faculty of Electrical Engineering Silesian University of Technology;

Institute of Measurement Science Electronics and Control - Faculty of Electrical Engineering Silesian University of Technology;

Department of Nuclear Physics and Its Applications Institute of Physics University of Silesia;

Department of Radioisotopes Institute of Physics - Centre for Science and Education Silesian University of Technology;

Department of Radioisotopes Institute of Physics - Centre for Science and Education Silesian University of Technology;

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原文格式 PDF
正文语种 eng
中图分类物理学;原子核物理学、高能物理学;
关键词
MultiCell spectrometer; Rapid14C dating; 222Rn contribute correction; Delayed coincidence method; 214Bi/214Po pairs counting;

机译：Multicell光谱仪;Rapid14C约会;222RN贡献纠正;延迟巧合法;214Bi / 214Po对计数;

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A low level liquid scintillation spectrometer with five counting modules for 14C, 222Rn and delayed coincidence measurements

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