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Re:Physicists Produce Neutrino Images of Milky Way Galaxy by MikeDelta on Thursday June 29, 2023 @09:18PM (#36529331)
Water and ice versions exist, IceCube consists of detectors dug into ice and Super Kamiokande (example) is a big container of ultrapure water (not heavy). Hyper Kamiokande will be even bigger.

https://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory https://en.wikipedia.org/wiki/Super-Kamiokande https://en.wikipedia.org/wiki/Hyper-Kamiokande

Re:Physicists Produce Neutrino Images of Milky Way Galaxy by 0PingWithJesus on Friday June 30, 2023 @07:26AM (#36533053)
Most neutrino experiments don't/didn't use heavy water, but the SNO experiment did.

https://en.wikipedia.org/wiki/Sudbury_Neutrino_Observatory