EPR-Study the Decay Kinetics of Free Radicals in Irradiated Sucrose

Q3 Mathematics

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-08-01 DOI:10.18698/1812-3368-2023-4-141-158

I.M. Medzhidov, I.V. Polyakova, S.A. Gorbatov, D.I. Petrukhina, V.I. Shishko, O.V. Tkhorik, V.A. Kharlamov

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Abstract

Electron paramagnetic resonance (EPR) spectrometry makes it possible to study the formation of free radicals during the transfer of energy to the object. The decay kinetics of free radicals is an integral part of the study since this phenomenon directly interferes with the goals of accurate identification of the irradiation fact and dosimetry using EPR spectrometry. In this work, we have studied the time dependence of the intensity and characteristics of the EPR signal of analytical sucrose irradiated with gamma rays at doses from 0.3 to 9 kGy. It has been shown that irradiated sucrose gives a stable EPR peak after 60 days. A change in the spectral characteristics of the signal was recorded in the first 23 hours after irradiation. The signal intensity tends to increase in the first 72 hours after irradiation for a sample with an irradiation dose of 300 Gy and 48 hours for 1000 Gy. The dependence of the signal intensity on the absorbed dose is linear in the range of studied doses. The g-factor value at the intersection point of the derivative contour with the zero line is 2.013. Based on the data obtained, it can be assumed that sucrose (sugar) is one of the best candidates among solid radiation-sensitive materials for identifying the fact of irradiation using EPR spectrometry

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辐照蔗糖中自由基衰变动力学的epr研究

电子顺磁共振(EPR)光谱法使研究能量向物体转移过程中自由基的形成成为可能。自由基的衰变动力学是研究的一个组成部分，因为这种现象直接干扰了使用EPR光谱法准确识别辐照事实和剂量测定的目标。在这项工作中，我们研究了在0.3至9 kGy剂量的伽马射线照射下分析蔗糖的EPR信号强度和特征的时间依赖性。研究表明，辐照蔗糖在60天后达到稳定的EPR峰值。在辐照后的头23小时内，记录了信号的光谱特征的变化。辐照剂量为300 Gy和1000 Gy的样品，在辐照后72小时内信号强度有增加的趋势。在研究的剂量范围内，信号强度与吸收剂量的关系是线性的。导数轮廓与零线交点处的g因子值为2.013。根据获得的数据，可以假设蔗糖(糖)是固体辐射敏感材料中使用EPR光谱法识别辐照事实的最佳候选者之一

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来源期刊

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Mathematics-Mathematics (all)

CiteScore

1.10

自引率

0.00%

发文量

期刊介绍： The journal is aimed at publishing most significant results of fundamental and applied studies and developments performed at research and industrial institutions in the following trends (ASJC code): 2600 Mathematics 2200 Engineering 3100 Physics and Astronomy 1600 Chemistry 1700 Computer Science.