Stainless steel is the material used for the storage vessels and piping systems of LAB-based liquid scintillator in JUNO experiment. Aging is recognized as one of the main degradation mechanisms affecting the properties of liquid scintillator. LAB-based liquid scintillator aging experiments were carried out in different material of containers (type 316 and 304 stainless steel and glass) at two different temperature (40 and 25 degrees Celsius). For the continuous liquid scintillator properties tests, the light yield and the absorption spectrum are nearly the same as that of the unaged one. The attenuation length of the aged samples is 6%~12% shorter than that of the unaged one. But the concentration of element Fe in the LAB-based liquid scintillator does not show a clear change. So the self aging has small effect on liquid scintillator, as well as the stainless steel impurity quenching. Type 316 and 304 stainless steel can be used as LAB-based liquid scintillator vessel, transportation pipeline material.
@article{arxiv.1409.1298,
title = {Aging research of the LAB-based liquid scintillator in stainless steel container},
author = {Hai-tao Chen and Bo-xiang Yu and Qing Shan and Ya-yun Ding and Bing Du and Shu-tong Liu and Xuan Zhang and Li Zhou and Wen-bao Jia and Jian Fang and Xing-chen Ye and Wei Hu and Shun-li Niu and Jia-qing Yan and Hang Zhao and Dao-jin Zhao},
journal= {arXiv preprint arXiv:1409.1298},
year = {2014}
}