optical and ultraviolet photons must also be developed and validated.

In this study, we have performed several experimental tests aimed at elucidating these properties, and we have also developed a simulation model that successfully predicts the performance of the WbLS material in our measurement geometries. It is our intention to further develop and validate this simulation model using larger volume geometries to permit accurate study of the performance of a proposed large experiment that uses WbLS as its detection medium.

![The optical attenuation spectra for the 1% WbLS used in this study (solid black) and for a more recent formulation of 1% WbLS (dashed black). The 1% WbLS fluorescence spectrum (green) and photomultiplier tube (Hamamatsu R7723) quantum efficiency (red) are also indicated. The fluorescence spectrum was measured using an exciting wavelength of 290 nm.[]{data-label="fig:UVVIS"}](UV-VIS_Fluor_NoLegend_v3.pdf){width="0.8\columnwidth"}

Experiment {#sec:Expt}
==========

WbLS Samples
------------

WbLS samples composed of 0.4% (WbLS-1) and 1% (WbLS-2) liquid scintillator by mass were prepared, as well as pure liquid scintillator (LS) samples. The pure LS was identical to that used by the Daya Bay experiment [@An2012etal]. Table \[tab:ScintComp\] details the compositions of these samples.

   Sample Name   Organic Phase   Primary Fluor    Secondary Fluor
  ------------- --------------- --------------- --------------------
     WbLS-1        PC, 0.4%      