Development of a method for distinguishing alpha particles from other types of radiation using a high-resolution alpha imager

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2025-02-01 DOI:10.1016/j.radmeas.2024.107371

Yuki Morishita , Naoki Sagawa , Makoto Fujisawa , Shunsuke Kurosawa , Makoto Sasano , Masateru Hayashi , Hiroki Tanaka

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Abstract

The effects of different types of radiation on a high-resolution alpha imager developed using an electron multiplying charge-coupled device (EMCCD) camera were investigated. This imager was originally developed to visualize alpha particles from Pu oxide particles at decommissioning sites. Other types of radiation such as beta particles, gamma rays, and neutrons are also present. The purpose of this study is to investigate the effects of these background radiations on the imager and to develop a method to discriminate between alpha particles and other types of radiation. When measuring gamma rays, and neutrons, the sensor of the EMCCD camera generated high intensity signals due to gamma rays and neutrons. These radiations were identified by image processing. The image values were binarized and the findContours function for detecting edges in an image was applied to count the number of alpha particle spots. The results showed that alpha and gamma (neutron) radiation can be discriminated by using differences in intensity. This method will be useful for visualizing alpha particles at decommissioning sites.

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开发一种利用高分辨率α成像仪从其他类型的辐射中区分α粒子的方法

研究了不同类型的辐射对电子倍增电荷耦合器件（EMCCD）相机研制的高分辨率α成像仪的影响。该成像仪最初是为了在退役现场观察氧化Pu颗粒中的α粒子而开发的。其他类型的辐射，如β粒子、伽马射线和中子也存在。本研究的目的是研究这些背景辐射对成像仪的影响，并开发一种区分α粒子和其他类型辐射的方法。在测量伽马射线和中子时，EMCCD相机的传感器由于伽马射线和中子而产生高强度信号。这些辐射是通过图像处理识别出来的。对图像值进行二值化处理，利用检测图像边缘的findContours函数对α粒子点进行计数。结果表明，利用中子辐射强度的差异可以区分α和γ辐射。这种方法将有助于在退役地点可视化α粒子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.