Ponente
Descripción
Imaging sensors made from an ionization target layer of amorphous selenium (aSe) coupled to a silicon complementary metal-oxide-semiconductor (CMOS) active pixel array for charge readout are a promising technology for neutrino physics. The high spatial resolution in a solid-state target provides unparalleled rejection of backgrounds from natural radioactivity in the search for neutrinoless 𝛽𝛽 decay and for solar neutrino spectroscopy with $^{82}$Se. We present results on the ionization response of aSe measured from the photoabsorption of 122keV 𝛾 rays in a single-pixel device, and report on the progress in the fabrication and testing of the first prototype imaging sensors based on the Topmetal-II pixelated CMOS charge readout chip. We explore the scientific reach of a large neutrino detector with the proposed technology based on our experimental understanding of the sensor performance.
| Reference to paper (DOI or arXiv) | arXiv:2012.04079 |
|---|
