Double Beta Decay Options in SNO

The heavy water experiment in SNO will complete data taking at the end of 2006.~ We are preparing a proposal for an experiment in which we will replace the heavy water with liquid scintillator, to measure low energy solar neutrinos, geo-neutrinos, reactor oscillations and double beta decay.~ We plan to measure double beta decay by dispersing isotopes into the scintillator volume.~ Large masses are possible, which allow us to set~effective mass limits~at a sensitivity $<$100~meV.~ I will report on the various techniques and isotopes that we~are considering.