同位素2024，Vol.37Issue(4)：341-346,6.DOI:10.7538/tws.2024.youxian.007
一种具有射程鉴别能力的气体探测器研制
Development of a Gas Detector with Range Discrimination Capability
修诚利 1张文慧 1赵庆章 1何明 1包轶文 1李康宁 1李建良 1郭巍 1董鹏伟1
作者信息
- 1. 中国原子能科学研究院,北京 102413
- 折叠
摘要
Abstract
In compact accelerator mass spectrometry(AMS)systems,the detection of low-energy ions is often interfered by interfering ions with the same magnetic rigidity and electric rigidity as the target nuclide.To address this issue,a gas detector with range detection capability was developed for low-energy small-scale AMS.By exploiting the different ranges of the target nuclide and interfering ions,all interfering ions are absorbed in an absorber chamber while the target nuclide can pass through and enter an amplification chamber with proportional amplification functionality,thus facilitating the measurement of the target nuclide.To validate the performance of the gas detector,a series of calibration experiments were conducted using 5.8 MeV alpha particles.Experimental and simulation results demonstrate that the absorber chamber effectively absorbs interfering ions of different energies,and the energy resolution of amplification chamber is around 30％for the one-way signal.At the same time,when the reduced field strength in the amplification chamber is at 5 V·mm-1·hPa-1,the signal can be amplified by about 7 times.The energy resolution of the combined signals from the absorber and the amplification chamber is improved to around 20％,laying the foundation for the measurement of nuclides such as 26Al in low-energy small-scale AMS.关键词
加速器质谱/气体电离/干扰离子/吸收室/放大室Key words
AMS/gas ionization/interfering ions/absorber chamber/amplification chamber分类
能源科技引用本文复制引用
修诚利,张文慧,赵庆章,何明,包轶文,李康宁,李建良,郭巍,董鹏伟..一种具有射程鉴别能力的气体探测器研制[J].同位素,2024,37(4):341-346,6.
