Water-based liquid scintillators (WbLS) present an attractive target medium for large-scale detectors with the ability to enhance the separation of Cherenkov and scintillation signals from a single target. This work characterizes the scintillation properties of WbLS samples based on LAB/PPO liquid scintillator (LS). X-ray luminescence spectra, decay profiles, and relative light yields are measured for WbLS of varying LS concentration as well as for pure LS with a range of PPO concentrations up to 90 g/L. The scintillation properties of the WbLS are related to the precursor LAB/PPO: starting from 90 g/L PPO in LAB before synthesis, the resulting WbLS have spectroscopic properties that instead match 10 g/L PPO in LAB. This could indicate that the concentration of active PPO in the WbLS samples depends on their processing.
@article{arxiv.2003.10491,
title = {Time Response of Water-based Liquid Scintillator from X-ray Excitation},
author = {Drew R. Onken and Federico Moretti and Javier Caravaca and Minfang Yeh and Gabriel D. Orebi Gann and Edith D. Bourret},
journal= {arXiv preprint arXiv:2003.10491},
year = {2020}
}
Comments
6 pages, 7 figures, 2 tables. Submitted to Materials Advances, a journal of the Royal Society of Chemistry