Estimation of Radiation Distribution Using Shielding Attenuation by a Mobile Robot Equipped with Non-Directional Detectors and Lightweight Shielding

抄録

This study proposes an estimation method of radiation source distribution in high-dose environments using a mobile robot equipped with a non-directional detector and lightweight shielding, exploiting shielding attenuation. One challenge with radiation source distribution estimation using non-directional detectors is the decreased accuracy when measurement points are unevenly distributed. By leveraging the rotational motion of lightweight shielding and capitalizing on shielding attenuation, we propose a method to enable the non-directional detector to acquire directional information. The obtained radiation measurement results were used to explore the most likely radiation source distribution through maximum likelihood estimation. Through simulation experiments, the effectiveness of the proposed method was confirmed, demonstrating an improvement in the accuracy of radiation source distribution estimation.