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Updated: Mar 14, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

基于²²⁸Th从工业酸中分离出来的无源的制备

Chunyu He¹, Lingzhi Cui², Kang Peng³

¹Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, 100871, China.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

|March 12, 2026

概括

研究人员开发了新的 () 源,以改善活动度测量. 一种TEVA树脂柱法增强了228Th回收和源稳定性,这对于准确检测至关重要.

科学领域:

放射化学放射化学是指辐射化学.
计量学计量学计量学
环境科学环境科学

背景情况:

精确测量 () 活性度对于计量可追溯性至关重要.
目前生产源的现有方法在稳定性和效率方面存在局限性.

研究的目的:

开发和评估新型流通源,以提高计量学可追溯性.
为了比较两种分离228Th和生产稳定的源的方法.

主要方法:

使用两种不同的方法从工业酸中分离228Th.
准备四个流通源,其活动范围从120 Bq到1200 Bq.
评估源活动,多伦发射系数和稳定性.

主要成果:

与直接浸泡相比,TEVA树脂柱法产生了明显更高的228Th回收率和更好的稳定性.
的发射系数随着绝对湿度的增加而增加.
在高绝对湿度 (>20 g/m3) 的情况下,获得了 96.37% ± 2.38% 的平均辐射系数.

结论:

在生产稳定高效的以228Th为基础的源方面,TEVA树脂柱法优越.
绝对湿度是影响多辐射的关键因素,可以控制多度环境.
这些发现有助于提高多伦活性度测量的计量可追溯性.

关键词:

(228) 没有什么.排放系数稳定性的排放系数稳定性工业酸晶体的酸.没有的多源.

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