A scintillating fiber array measurement system for gross beta is developed to achieve real-time monitoring of radioactivity in drinking water. The detector consists of 1,096 scintillating fibers, both sides of the fibers connect to a photomultiplier tube, and they are placed in a stainless steel tank. The detector parameters of working voltage, background counting rate and stability of the detector were tested, and the detection efficiency was calibrated using a standard solution of potassium chloride. Through experiment, the background counting rate of the detector is 38.31 cps and the detection efficiency for β particles is 0.37 cps per Bq per liter; the detector can reach its detection limit of 1.0 Bq per liter for β particles within 100 minutes without pre-concentration.
@article{arxiv.1707.05781,
title = {Gross beta determination using a scintillating fiber array detector for drinking water},
author = {Wenhui Lu and Hongchang Yi and Tongqing Liu and Zhi Zeng and Junli Li and Hui Zhang and Hao Ma},
journal= {arXiv preprint arXiv:1707.05781},
year = {2017}
}