Study on dosimetric characteristics of polycarbonate films irradiated by electron beam

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2024-11-12 DOI:10.1016/j.radmeas.2024.107333

Ke Wang , Zhizeng Pan , Longxiang Yin , Haifeng Zhang , Yuchen Zou , Xionghui Fei

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Abstract

In this study, the dosimetric characteristics (thickness applicability, dose linear response, signal fading characteristic, in-batch consistency, readout reproducibility, humidity dependence, and electron energy response) of engineering polycarbonate films irradiated by electron beam were studied using spectrophotometry. The results show that polycarbonate films of various thicknesses exhibit good dose linearity within their corresponding wavelength ranges. Specifically, the dose capture range of 0.3 mm polycarbonate film spans from 950 Gy to 1000 kGy. After irradiation, the net absorbance of polycarbonate films showed an exponential decline, which was dose-dependent. The average absolute deviation of net absorbance for polycarbonate films produced within the same batch is 1.49% at 100 kGy. After 15 repeated absorbance measurements, the coefficient of variation in net absorbance for the polycarbonate films is less than 1%. Additionally, the radiation response of the polycarbonate film is affected by the environment relative humidity (during irradiation and post-irradiation storage). At the same dose of 3.5–20 MeV electron beam irradiation, the net absorbance response deviation of polycarbonate films remains below 2.26%. These results provide a comprehensive reference for detecting high doses of electron beams using engineering polycarbonate films.

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电子束辐照聚碳酸酯薄膜的剂量特性研究

本研究利用分光光度法研究了电子束照射工程聚碳酸酯薄膜的剂量特性（厚度适用性、剂量线性响应、信号衰减特性、批量一致性、读出再现性、湿度依赖性和电子能量响应）。结果表明，不同厚度的聚碳酸酯薄膜在相应的波长范围内表现出良好的剂量线性。具体来说，0.3 毫米聚碳酸酯薄膜的剂量捕获范围从 950 Gy 到 1000 kGy。辐照后，聚碳酸酯薄膜的净吸光度呈指数下降，且与剂量有关。100 kGy 时，同一批次生产的聚碳酸酯薄膜净吸光度的平均绝对偏差为 1.49%。经过 15 次重复吸光度测量，聚碳酸酯薄膜的净吸光度变化系数小于 1%。此外，聚碳酸酯薄膜的辐射响应受环境相对湿度（辐照期间和辐照后储存）的影响。在相同剂量的 3.5-20 MeV 电子束辐照下，聚碳酸酯薄膜的净吸光度响应偏差保持在 2.26% 以下。这些结果为使用工程聚碳酸酯薄膜检测高剂量电子束提供了全面的参考。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.