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在ISIS中子与介子源利用超热中子进行同位素成像。

Isotopic imaging with epithermal neutrons at the ISIS Neutron and Muon Source.

作者信息

Marcucci Giulia, Scherillo Antonella, Raspino Davide, Di Martino Daniela

机构信息

STFC ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Didctot, UK.

Dipartimento di Fisica "G. Occhialini", Università degli Studi di Milano-Bicocca and INFN Sezione di Milano-Bicocca, Milano, Italy.

出版信息

Sci Rep. 2025 Jun 2;15(1):19344. doi: 10.1038/s41598-025-04283-y.

DOI:10.1038/s41598-025-04283-y
PMID:40456874
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12130481/
Abstract

An advanced non-invasive isotopic imaging technique based on Neutron Resonance Transmission Imaging (NRTI) has been implemented at the INES beamline of the ISIS Neutron Muon Source (UK), featuring high sensitivity to isotopes and enabling enhanced contrast in bulk radiography. NRTI relies on the neutron resonant absorption reactions occurring at epithermal energies. Nuclear resonance energies are isotope fingerprints, since the energy position of resonance dips in the transmitted neutron spectrum is uniquely associated with the individual isotopes present in the sample. Using a time and space-resolved detector with an event-mode acquisition system it is possible to conduct simultaneous spectroscopy and imaging investigation by recording the transmitted spectra in each pixel. Resonance selections can be performed post-processing through specific data analysis tools to enhance the absorption contrast of selected isotopes and visualise their distribution in the bulk. A pilot study with samples enriched with Ag-109 and Ag-107 is presented to demonstrate the potential of NRTI at the ISIS facility as a powerful and competitive tool for isotopic imaging. Future quantitative calibration for accurate isotopic ratio evaluation will expand its utility across various fields, such as nuclear engineering and archaeology, enabling detailed non-invasive analysis of complex materials previously challenging with conventional methods.

摘要

一种基于中子共振透射成像（NRTI）的先进非侵入性同位素成像技术已在英国ISIS中子μ子源的INES光束线实施，该技术对同位素具有高灵敏度，并能在体层射线照相中增强对比度。NRTI依赖于超热能量下发生的中子共振吸收反应。核共振能量是同位素指纹，因为透射中子谱中共振峰谷的能量位置与样品中存在的各个同位素唯一相关。使用具有事件模式采集系统的时间和空间分辨探测器，通过记录每个像素中的透射谱，可以进行同步光谱学和成像研究。可以通过特定的数据分析工具在后期处理中进行共振选择，以增强所选同位素的吸收对比度并可视化它们在体中的分布。本文展示了一项对富含Ag-109和Ag-107样品的初步研究，以证明NRTI在ISIS设施中作为一种强大且有竞争力的同位素成像工具的潜力。未来用于准确同位素比率评估的定量校准将扩大其在各个领域的应用，如核工程和考古学，能够对以前用传统方法具有挑战性的复杂材料进行详细的非侵入性分析。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/8fad5984497e/41598_2025_4283_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/997714c8c36c/41598_2025_4283_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/e51c7c268b17/41598_2025_4283_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/b5d89129d70b/41598_2025_4283_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/8fad5984497e/41598_2025_4283_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/997714c8c36c/41598_2025_4283_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/43d073d0aa76/41598_2025_4283_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/29b5b0732cdf/41598_2025_4283_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/ed17fa508f53/41598_2025_4283_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/a731facbd2fe/41598_2025_4283_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/e51c7c268b17/41598_2025_4283_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/b5d89129d70b/41598_2025_4283_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1983/12130481/8fad5984497e/41598_2025_4283_Fig8_HTML.jpg

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