Constraints on the electron-hole pair creation energy and Fano factor below 150 eV from Compton scattering in a skipper CCD
نویسندگان
چکیده
Fully depleted thick silicon skipper-charge-coupled devices (skipper CCDs) are an important technology to probe neutrino and light-dark-matter interactions due their subelectron read-out noise. However, the successful search for rare or dark-matter events requires signal all backgrounds be fully characterized. In particular, a measurement of electron-hole pair creation energy below 150 eV Fano factor necessary characterizing dark matter signals. Moreover, photons from background radiation may Compton scatter in bulk, producing that can mimic signal. We present spectrum using skipper CCD $^{241}\mathrm{Am}$ source. With these data, we estimate pair-creation $(3.71\ifmmode\pm\else\textpm\fi{}0.08)\text{ }\mathrm{eV}$ at 130 K range between 99.3 eV. By measuring widths steps spectrum, introduce novel technique measure factor, setting upper limit 0.31 90% C.L. These results prove potential CCDs characterize precisely
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.106.072005