在 CS-30 回旋加速器拱顶中识别放射性同位素。
Identification of Activation Isotopes in a CS-30 Cyclotron Vault.
机构信息
Nuclear Science Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia.
Physics and Astronomy Department, College of Science, King Saud University (KSU), P.O. Box 145111, Riyadh 11362, Saudi Arabia.
出版信息
Sensors (Basel). 2022 Mar 28;22(7):2581. doi: 10.3390/s22072581.
A CS-30 cyclotron has been in operation at King Faisal Specialist Hospital and Research Center (KFSHRC) since 1982. The CS-30 cyclotron has been used to produce medical radioisotopes for positron emission tomography (PET) and single-photon emission computed tomography (SPECT). Some of the nuclear reactions of radionuclide production are associated with the intense release of a wide range of fast neutrons. In this work, we investigated the radionuclides produced from neutron interactions with the cyclotron facility walls. Activation isotopes were determined by performing gamma ray spectrometry utilizing a high-purity germanium (HPGe) detector. The major radionuclides found were Eu, Eu, Cs, Zn and Co. Activation isotope accumulation had increased the dose rate inside the facility. The surface dose rates were measured at all of the surrounding walls. The maximum surface dose rate was found to be 1.2 µSv/h, which is much lower than the permissible occupational exposure of 15 µSv/h based daily 5 work hours.
自 1982 年以来，一台 CS-30 回旋加速器一直在法伊萨尔国王专科医院和研究中心（KFSHRC）运行。该 CS-30 回旋加速器用于生产正电子发射断层扫描（PET）和单光子发射计算机断层扫描（SPECT）的医用放射性同位素。一些放射性核素的产生与高强度释放各种快中子有关。在这项工作中，我们研究了回旋加速器设施墙壁与中子相互作用产生的放射性核素。通过使用高纯锗（HPGe）探测器进行伽马射线光谱分析来确定活化同位素。发现的主要放射性核素是 Eu、Eu、Cs、Zn 和 Co。活化同位素的积累增加了设施内的剂量率。测量了所有周围墙壁的表面剂量率。发现最大表面剂量率为 1.2µSv/h，远低于基于每日 5 小时工作的 15µSv/h 的允许职业照射。
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