E-Mail IMAGE: A worker at the Daya Bay Reactor Neutrino Experiment site is perched near a water pool where four large detectors are submerged in this August 2012 photo. view more Credit: Roy Kaltschmidt/Berkeley Lab The Daya Bay Reactor Neutrino Experiment collaboration - which made a precise measurement of an important neutrino property eight years ago, setting the stage for a new round of experiments and discoveries about these hard-to-study particles - has finished taking data. Though the experiment is formally shutting down, the collaboration will continue to analyze its complete dataset to improve upon the precision of findings based on earlier measurements.