CIAE紧凑型AMS系统在236U分析中的进展

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-09-04 DOI:10.1016/j.nimb.2025.165845

Jianliang Li, Qingzhang Zhao, Ming He, Chengli Xiu, Wenhui Zhang, Yiwen Bao, Kangning Li, Shengyong Su, Wei Guo

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引用次数: 0

摘要

近年来，长寿命放射性核素236U已成为地球化学和海洋学研究中强有力的示踪剂。因此，本研究利用中国原子能科学研究院自主研制的紧凑型加速器质谱（AMS）系统对236U和其他铀同位素进行了分析。通过对光束传输、粒子检测和背景抑制技术的优化研究，建立了236U测量方法，并对其测量性能进行了评价。236U/238U的丰度灵敏度接近10-15，并讨论了狭缝设置等各种因素的影响。结果表明，CIAE紧凑型AMS系统能够在低能条件下对铀样品进行快速、稳定、高灵敏度的分析。

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Progress in 236U analysis with the compact AMS system at CIAE

The long-lived radionuclide ²³⁶U has become a powerful tracer in geochemical and oceanographic studies in recent years. Therefore, the present study is carried out to analyse ²³⁶U and other U-isotopes with the compact accelerator mass spectrometry (AMS) system independently developed by the China Institute of Atomic Energy (CIAE). Through the optimization study of beam transmission, particle detection and background suppression techniques, the ²³⁶U measurement method is established and the measurement performance is evaluated. The abundance sensitivity of ²³⁶U/²³⁸U is close to 10^-15 and the effects of various factors such as slit settings are discussed. The results show that the CIAE compact AMS system is capable of rapid, stable, and highly sensitive analysis of uranium samples under low-energy conditions.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.