Absolute measurement of the Fano factor using a Skipper-CCD

Journal Article · Thu Apr 23 00:00:00 EDT 2020 · TBD

OSTI ID:1682295

Rodrigues, Dario ^[1]; Andersson, Kevin ^[1]; Cababie, Mariano ^[1]; Donadon, Andre ^[1]; Cancelo, Gustavo ^[1]; Estrada, Juan ^[1]; Fernandez-Moroni, Guillermo ^[1]; Piegaia, Ricardo ^[2]; Senger, Matias ^[1]; Sofo Haro, Miguel ^[3]; Stefanazzi, Leandro ^[1]; Tiffenberg, Javier ^[1]; Uemura, Sho ^[4]

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1. Fermilab
2. Buenos Aires, CONICET
3. Centro Atomico Bariloche
4. Tel Aviv U.

Skipper-CCD can achieve deep sub-electron readout noise making possible the absolute determination of the exact number of ionized electrons in a large range, from 0 to above 1900 electrons. In this work we present a novel technique that exploits this unique capability to allow self-calibration and the ultimate determination of silicon properties. We performed an absolute measurement of the variance and the mean number of the charge distribution produced by $$^{55}$$Fe X-rays, getting a Fano factor absolute measurement in Si at 123K and 5.9 keV. A value of 0.119 $$\pm$$ 0.002 was found and the electron-hole pair creation energy was determined to be (3.749 $$\pm$$ 0.001) eV. This technology opens the opportunity for direct measurements of the Fano factor at low energies.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1682295
• Report Number(s): arXiv:2004.11499; FERMILAB-PUB-20-283-E; oai:inspirehep.net:1792791
• Journal Information: TBD, Journal Name: TBD
• Country of Publication: United States
• Language: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY