Bolometric detection of neutrinos

Elastic neutrino scattering off electrons in crystalline silicon at 1--10 mK results in measurable temperature changes in macroscopic amounts of material, even for low-energy (<0.41 MeV) pp {ν}'s from the sun. We propose new detectors for bolometric measurement of low-energy {ν} interactions, including coherent nuclear elastic scattering. A new and more sensitive search for oscillations of reactor antineutrinos is practical ({~}100 Kg of Si), and would lay the groundwork for a more ambitious measurement of the spectrum pp, ⁷Be and ⁸B solar {ν}'s, and supernovae anywhere in our galaxy ({~}10 tons of Si).