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Neutrinos Sketch Earth's Mantle Heat Map
science1 hour ago

Neutrinos Sketch Earth's Mantle Heat Map

A global network of neutrino detectors, including Canada’s SNO+ and China’s JUNO, is measuring geoneutrinos to quantify the heat-producing elements in Earth’s mantle. Early results from SNO+ show western hemisphere fluxes that hint at mantle heterogeneity linked to deep structures like large low-shear-velocity provinces (LLSVPs), but large uncertainties remain. More data and improved geological modeling, and possibly an ocean-bottom detector, could sharpen the map of the planet’s interior heat sources.

via Quanta Magazine|
#geoneutrinos#juno#mantle
Pure-water detector marks distant reactor neutrinos, hinting at cheaper monitoring
science1 month ago

Pure-water detector marks distant reactor neutrinos, hinting at cheaper monitoring

During a 2018 calibration, the SNO+ detector buried deep underground in Ontario used ultrapure water to detect inverse beta decay from antineutrinos emitted by a nuclear reactor over 240 kilometers away, with 99.7% confidence that the signal was reactor-related. The finding shows that plain water can be used to monitor distant reactors via antineutrinos and opens the door to cheaper, safer neutrino-detection methods, while contributing to fundamental neutrino physics.

via Yahoo|
#antineutrinos#inverse-beta-decay#neutrinos
Underground Water Senses Antineutrinos From a Faraway Reactor
science1 month ago

Underground Water Senses Antineutrinos From a Faraway Reactor

Scientists at the SNO+ underground lab detected inverse beta decay signals from antineutrinos emitted by a nuclear reactor roughly 240 km away using ultrapure water in a large tank, marking the first time water alone captured such low-energy events (down to 1.4 MeV). An analysis of 190 days of calibration data yielded a 3-sigma candidate signal, suggesting plain water could someday be used to monitor reactor output at a distance and demonstrating a cheaper path for neutrino detection.

via ScienceAlert|
#antineutrinos#inverse-beta-decay#neutrinos
"Pure Water at SNO+ Detects Distant Fission Reactor Anti-Neutrinos"
science3 years ago

"Pure Water at SNO+ Detects Distant Fission Reactor Anti-Neutrinos"

The SNO+ neutrino detector project has shown that it can detect anti-neutrinos originating from nuclear fission reactors over 240 kilometers away, including Canadian CANDU and US LWR types. The low detection threshold of the SNO+ detector, even in its incomplete state, has made this possible. The focus of SNO+ on nearby nuclear fission reactors is due to the constant beta decay that occurs in their nuclear fuel, which produces electron anti-neutrinos in a predictable manner.

via Hackaday|
#anti-neutrinos#detection-sensitivity#neutrinos
Antineutrinos Detected 150 Miles from Nuclear Power Station in Water Cherenkov Detector
science-and-technology3 years ago

Antineutrinos Detected 150 Miles from Nuclear Power Station in Water Cherenkov Detector

Scientists have detected antineutrinos, the antiparticle counterpart to neutrinos, using pure water for the first time. The antineutrinos originated from a nuclear reactor located 150 miles away from the SNO+ detector, buried under kilometers of rock in Ontario, Canada. This breakthrough could lead to inexpensive and safe neutrino experiments and monitoring technology. The SNO+ detector is currently being used to help understand neutrinos and antineutrinos better, and is searching for a rare, never-before-seen decay that could answer one of the biggest questions in particle physics.

via ScienceAlert|
#antineutrinos#neutrinos#nuclear-reactors