Dosimetric platform and a genuine Raman protocol for passive estimation of fast-neutron fluence in irradiated SiC and SiC topped with epitaxial graphene

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-06-27 DOI:10.1016/j.rinp.2025.108332

Jakub Jagiełło , Artur Dobrowolski , Tymoteusz Ciuk , Rafał Prokopowicz , Barbara Bieńkowska , Jakub Włodarczyk , Semir El-Ahmar , Maciej J. Szary , Mirosław Szybowicz

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引用次数: 0

Abstract

The article introduces a genuine ex-situ measurement protocol to estimate the integrated flux of mostly fast (1-2 MeV) neutrons. It is verified up to the fluence of 6.5 × 10¹⁸ n/cm². A dedicated dosimetric platform comprises p-type hydrogen-intercalated quasi-free-standing epitaxial Chemical Vapor Deposition graphene on semi-insulating vanadium-compensated nominally on-axis 6H-SiC(0001) and a 100-nm-thick atomic-layer-deposited amorphous aluminum oxide encapsulation. The methodology correlates the total area under the averaged Raman spectra of SiC, between 60 cm^-1 and 1200 cm^-1, upon prior normalization to the maximum value of the longitudinal optical mode at 964 cm^-1. The patterned a-Al₂O₃/QFS-graphene/6H-SiC(0001) system offers two verification mechanisms — one within the graphene mesa and the other outside. Following the protocol, one can read the neutron fingerprint in the material and relate it to the integrated flux. The passive character of the method eliminates the radiological hazards associated with traditional activation methods. The approach enables localized and precise fluence control in fissile and thermonuclear facilities with a Root Mean Squared Percentage Error of the fitted model of approximately 4%.

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剂量学平台和真正的拉曼协议，用于被动估计辐照SiC和覆盖外延石墨烯的SiC中的快中子通量

本文介绍了一种真正的非原位测量方案，用于估计大部分快中子（1- 2mev）的综合通量。经验证可达6.5 × 1018 n/cm2。专用剂量测量平台包括半绝缘钒补偿的6H-SiC（0001）上的p型氢插层准独立外延化学气相沉积石墨烯和100纳米厚的原子层沉积非晶氧化铝封装。该方法将SiC平均拉曼光谱下的总面积（在60 cm-1和1200 cm-1之间）与纵向光学模式的最大值（964 cm-1）进行归一化。a-Al2O3/ qfs -石墨烯/6H-SiC（0001）系统提供两种验证机制-一种在石墨烯台面内，另一种在外部。按照该方案，可以读取材料中的中子指纹，并将其与综合通量联系起来。该方法的被动特性消除了与传统激活方法相关的辐射危害。该方法能够在裂变和热核设施中实现局部和精确的通量控制，拟合模型的均方根百分比误差约为4%。

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

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

期刊介绍： Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.