First Protactinium-231 measurements using the MILEA AMS system

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 : 2025-08-16 DOI:10.1016/j.nimb.2025.165824

Janis Wolf , Marcus Christl , Sebastian Fichter , Robin Steudtner , Habacuc Perez Tribouillier , Stella Winkler , Anton Wallner

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引用次数: 0

Abstract

We present an AMS-based method for measuring

231 Pa

at natural levels in environmental samples. A chemical procedure extracts

231 Pa

from sea sediments using

233 Pa

as a reference isotope.

233 Pa

was separated from its mother-nuclide

237 Np

via single-step extraction chromatography. AMS measurements at the Multi-Isotope-Low-Energy AMS System (MILEA) at ETH Zürich showed no interference from

232 Th

. We determined a

231 Pa

concentration of (3.6 ± 0.6) × 10⁹ atoms/g in the IAEA-385 reference material (Irish Sea sediment). We report on the development and implementation of a measurement procedure for

231 Pa

AMS, demonstrating its potential for ultra-trace environmental studies.

查看原文本刊更多论文

首次使用MILEA AMS系统测量proactinium -231

我们提出了一种基于ams的方法来测量环境样品中自然水平的231Pa。一种化学方法将233Pa作为参考同位素从海洋沉积物中提取231Pa。通过单步萃取色谱法将233Pa从母核素237Np中分离出来。在ETH z rich的多同位素-低能AMS系统（MILEA）上进行的AMS测量没有发现来自232Th的干扰。我们测定了IAEA-385标准物质（爱尔兰海沉积物）中231Pa的浓度为（3.6±0.6）× 109个原子/g。我们报告了231Pa AMS测量程序的开发和实施，展示了其在超痕量环境研究中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.