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  • 1. ChinaXiv:202507.00132
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    The research of backscattering effect on the installed area monitors and/or warning devices for gamma radiation

    分类: 物理学 >> 核物理学 提交时间: 2025-07-07

    梁, Dr. 杰 Wang, Mr. Ke-liang Guo, Dr. Ji-ping Zhang, Mrs. Fan Wu, Ms. Ya-qin Jun, Prof. Yang Zhun, Prof. Ying-chun

    摘要: This paper reports an experimental investigation into the backscatter effects on gamma radiation monitors. The study addresses deviations in measurement readings observed in wall-mounted monitors compared to free-air devices due to backscatter phenomena. Reinforced concrete test blocks were employed to simulate operational environments, with measurements conducted using three detector types: a radiation protection level dosimeter with ionization chamber, an air-kerma radiation monitor with counter tube, and a radiation detector with NaI(Tl) scintillator. Analysis of backscatter factors at varying distances and orientations revealed that: (1) backscatter factors decreased with increasing source-to-surface distance, and (2) central irradiation generally yielded higher backscatter factors than non-central irradiation. The experimental data provide essential reference for formulating or revising pertinent technical standards.

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