Design and development of a plastic scintillator based whole body β/γcontamination monitoring system

• 作者: Vaishali M.Thakur Amit Jain P.Ashokkumar Rekha Anilkumar Pravin Sawant Probal Chaudhury L.M.Chaudhari
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS
• 页码范围: 33-42
• 页数: 10页
• 语种: 英文

摘要

Plastic scintillation detectors based whole bodyβ/γcontamination monitors are developed for use in radi-ation facilities. This microcontroller-based multi-detector system uses 13 plastic scintillator detectors, with mini-mized dead detection zones, monitoring the whole body, and conforming to the contamination limit prescribed by the regulatory authority. This system has the features for monitoring hands, feet, head, and face β/γusing contami-nation monitors and portal exit monitors. It can detect gamma sources at a dose rate of 10 nGyh-1. The system is calibrated usingβsources 90Sr/90Y, 204Tl, and 36Cl, and the efficiency is found to be 29％, 22％, and 18％, respectively. The minimum detectable β/γ contamination is 0.15 Bqcm-2, which is significantly less than the minimum detection objectives on head, face, hands, and feet.