Development of the measurement of radium using a germanium detector with molecular recognition resin
Development of the measurement of radium using a germanium detector with molecular recognition resin
复制标题
开发使用带有分子识别树脂的锗探测器测量镭
DOI：
10.1093/ptep/pty096
复制
发表时间：
2018
影响因子：
3.5
通讯作者：
Kishimoto Y
中科院分区：
文献类型：
--
作者：
Ito S;Ichimura K;Takaku Y;Abe K;Ikeda M;Kishimoto Y
高纯度锗（HPGe）探测器广泛用于测量低浓度放射性。在Super-Kamiokande Gadolinium项目中，Gd（SO）8HO中的镭浓度是通过使用HPGe探测器来确定的。样品的量通常受到HPGe检测器的样品空间的大小的限制。这导致检测器效率的限制。为了解决这一问题，提出了一种新的分子识别树脂化学萃取方法。用此方法从Gd（SO）_8HO中提取镭，并浓缩到树脂中，回收率为81%~ 4%。这使得可以将样品设置得更靠近HPGe晶体并降低自屏蔽效应，从而提高HPGe检测器的检测效率。本函报告了所开发的方法。
High-purity germanium (HPGe) detectors are widely used for the measurement of low concentrations of radioactivity. For the Super-Kamiokande Gadolinium project, the concentration of radium in Gd(SO)8HO is determined by using HPGe detectors. The amount of the sample is generally limited by the size of the sample space of an HPGe detector. This leads to limitation of the detector efficiency. A new method of chemical extraction using molecular recognition resin was developed to minimize this problem. Using the developed method, radium could be extracted from Gd(SO)8HO and concentrated to a smaller amount of the resin at a recovery rate of 81%4%, which was estimated by using barium as a recovery monitor. This made it possible to set the sample closer to an HPGe crystal and reduce the self-screening effect, resulting in increased detection efficiency for an HPGe detector. The method developed is reported in this letter.