Measurement of plutonium in surface modern corals by accelerator mass spectrometry

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 : 2025-08-17 DOI:10.1016/j.nimb.2025.165827

Huijuan Wang , Xianyu Zhan , Ming He , Qingzhang Zhao , Hua He , Zhiyong Liu , Mario De Cesare , Jingyu Mai , Chunping Huang , Yongjing Guan

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Abstract

To investigate the activity concentration and source of plutonium near Weizhou island in the Beibu Gulf, China, plutonium isotopes in different surface coral species were analyzed. The measured ²³⁹Pu activity concentrations in coral samples ranged from 3.12 to 19.93 mBq/kg. The statistically indistinguishable ²⁴⁰Pu/²³⁹Pu atomic ratios observed in coral skeletons (0.203 ± 0.004) and ambient seawater (0.202 ± 0.003), which contrast significantly with sediment ratios (0.221 ± 0.015). The ²⁴⁰Pu/²³⁹Pu atomic ratios (0.173–0.225) indicate that the plutonium deposition predominantly originates from global atmospheric fallout, with an estimated average 18 % contribution from the Pacific Proving Grounds.

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用加速器质谱法测量现代珊瑚表面的钚

为探讨北部湾涠洲岛附近海域钚的活性、浓度和来源，对不同表层珊瑚的钚同位素进行了分析。珊瑚样本中的239 - pu活性浓度为3.12 ~ 19.93 mBq/kg。珊瑚骨架（0.203±0.004）和环境海水（0.202±0.003）的240Pu/239Pu原子比与沉积物（0.221±0.015）的对比具有统计学意义。240Pu/239Pu原子比（0.173-0.225）表明，钚沉积主要来自全球大气沉降物，估计平均18%来自太平洋试验场。

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.