Microresonator detectors for neutrino physics in Milano

Superconducting microwave microresonators are low temperature detectors compatible with large-scale multiplexed frequency domain readout. We aim to develop detector arrays for calorimetric measurement of the energy spectra of 163Ho EC decay ( Q ∼ 2 – 3 keV ) for a direct measurement of the neutrino mass. We plan to investigate nitrides of high-Z materials, like TaN and HfN, that are appropriate for containing the energy of keV decay events, exploring the properties relevant to our detectors, such as quality factor, penetration depth and recombination time.