Liquid scintillator (LS) will be adopted as the detector material in JUNO (Jiangmen Underground Neutrino Observatory). The energy resolution requirement of JUNO is 3%, which has never previously been reached. To achieve this energy resolution, the light yield of liquid scintillator is an important factor. PPO (the fluor) and bis-MSB (the wavelength shifter) are the two main materials dissolved in LAB. To study the influence of these two materials on the transmission of scintillation photons in LS, 25 and 12 cm-long quartz vessels were used in a light yield experiment. LS samples with different concentration of PPO and bis-MSB were tested. At these lengths, the light yield growth is not obvious when the concentration of PPO is higher than 4 g/L. The influence from bis-MSB becomes insignificant when its concentration is higher than 8 mg/L. This result could provide some useful suggestions for the JUNO LS.
@article{arxiv.1506.00237,
title = {Preliminary study of light yield dependence on LAB liquid scintillator composition},
author = {Xing-Chen Ye and Bo-Xiang Yu and Xiang Zhou and Li Zhao and Ya-Yun Ding and Quan-Lin Jie and Shun-Li Niu and Meng-Chao Liu and Xue-Feng Ding and Xuan Zhang and Li Zhou and Jian Fang and Hai-Tao Chen and Wei Hu and Jia-Qing Yan and Hang Zhao and Dao-Jin Hong},
journal= {arXiv preprint arXiv:1506.00237},
year = {2015}
}