中圖分類號：TL816 文獻標志碼：A DOI: 10.16157/j.issn.0258-7998.245651
中文引用格式： 陳通，陳超，李衛(wèi)強，等. 一種便攜式穩(wěn)譜源探測器的研制[J]. 電子技術(shù)應用，2025，51(2)：52-57.
英文引用格式： Chen Tong，Chen Chao，Li Weiqiang，et al. Development of a portable stable spectrum source detector[J]. Application of Electronic Technique，2025，51(2)：52-57.

Development of a portable stable spectrum source detector

Abstract： Domestic logging companies currently possess thousands of built-in sources. The national control over radioactive sources is extremely stringent, making the management of stable spectrum sources a critical aspect of safety management. During maintenance or transportation, the instruments may be lost or stolen. If these situations are not promptly detected, it may lead to accidental radiation exposure of personnel or the risk of uncontrolled radioactive sources. Existing radiation source detectors are unable to detect the internal stable spectrum source signals of the instruments due to the shielding of high-density metal casings and the small volume of selected crystals. To address this issue, this paper develops a portable energy spectrum source detector. The device employs a high-resolution, large-volume sodium iodide (NaI) crystal and a Photomultiplier Tube (PMT), and utilizes the unique peak sampling principle of this class of detectors, achieving rapid and accurate detection of the shielded nanocurie-level stable spectrum source. The developed stable spectrum source detector is not only easy to operate and highly efficient in detection but also effectively identifies the stable spectrum sources inside the instruments without the need to disassemble them or when the instruments are not in operation.

Key words : scintillation crystal；photomultiplier tube；circuit design；peak sampling