Neutrino Physics and Dark Matter Physics with Ultra-Low-Energy Germanium Detector

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmology, Solar Interior, Dark Matter, Radio Telescopes And Instrumentation, Heterodyne Receivers, Radiation Detectors, Background Radiations

Scientific paper

The status and plans of the TEXONO Collaboration on the development of ultra-low-energy germanium detectors with sub-keV sensitivities are reported. We survey the scientific goals which include the observation of neutrino-nucleus coherent scattering, the studies of neutrino magnetic moments, as well as the searches of WIMP dark matter. In particular, an energy threshold of 220+/-10 eV at an efficiency of 50% were achieved with a four-channel prototype detectors each of an active mass of 5 g. New limits were set for WIMPs with mass between 3-6 GeV. The prospects of the realization of full-scale experiments are discussed. This detector technique makes the unexplored sub-keV energy window accessible for new neutrino and dark matter experiments.

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