SNO+

Secondary physics goals include measurement of neutrinos or antineutrinos from: The previous experiment, SNO, used heavy water (D2O) within the sphere and relied on Cherenkov radiation interaction.

In addition, a liquid scintillator experiment can detect anti-neutrinos like those created in nuclear fission reactors and the decay of thorium and uranium in the earth.

Originally the plan was to fill with 0.3% 130Te (800 kg),[1] but later talks have cited 0.5% (1.3 tonnes)[4] Earlier proposals placed more emphasis on neutrino observations.

The current emphasis on neutrinoless double beta decay is because the interior of the acrylic vessel has been significantly contaminated by radioactive daughter products of the radon gas that is common in the mine air.

As of early 2013, the cavity had been refurbished and re-sealed to new cleanliness standards, more stringent than for the original SNO due to the new experiment's greater sensitivity.