The CHErenkov / Scintillation Separation experiment (CHESS) has been used to demonstrate the separation of Cherenkov and scintillation light in both linear alkylbenzene (LAB) and LAB with 2g/L of PPO as a fluor (LAB/PPO). This is the first such demonstration for the more challenging LAB/PPO cocktail and improves on previous results for LAB. A time resolution of 338 +/- 12 ps FWHM results in an efficiency for identifying Cherenkov photons in LAB/PPO of 70 +/- 3% and 63 +/- 8% for time- and charge-based separation, respectively, with scintillation contamination of 36 +/- 5% and 38 +/- 4%. LAB/PPO data is consistent with a rise time of 0.75 +/- 0.25 ns.
@article{arxiv.1610.02011,
title = {Cherenkov and Scintillation Light Separation in Organic Liquid Scintillators},
author = {J. Caravaca and F. B. Descamps and B. J. Land and M. Yeh and G. D. Orebi Gann},
journal= {arXiv preprint arXiv:1610.02011},
year = {2017}
}