Absolute measurement of the Fano factor using a Skipper-CCD

Abstract

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.

six pages, five figures, three tables, one equation

References in corpus (8)

• Single-electron and single-photon sensitivity with a silicon Skipper CCD
• SENSEI: Direct-Detection Constraints on Sub-GeV Dark Matter from a Shallow Underground Run Using a Prototype Skipper-CCD
• Ionization Yield in Silicon for eV-Scale Electron-Recoil Processes
• The physics potential of a reactor neutrino experiment with Skipper CCDs: Measuring the weak mixing angle
• Instrumental response model and detrending for the Dark Energy Camera
• Charge collection efficiency in back-illuminated Charge-Coupled Devices
• Measurement of low energy ionization signals from Compton scattering in a CCD dark matter detector
• Charge Coupled Device detectors with high quantum efficiency at UV wavelengths

Cited by in corpus (27)

• EXCESS workshop: Descriptions of rising low-energy spectra
• Ionization Yield in Silicon for eV-Scale Electron-Recoil Processes
• Sources of Low-Energy Events in Low-Threshold Dark Matter and Neutrino Detectors
• The physics potential of a reactor neutrino experiment with Skipper CCDs: Measuring the weak mixing angle
• Detecting Beyond the Standard Model Interactions of Solar Neutrinos in Low-Threshold Dark Matter Detectors
• Precision measurement of Compton scattering in silicon with a skipper CCD for dark matter detection
• The physics potential of a reactor neutrino experiment with Skipper-CCDs: Searching for new physics with light mediators
• G4CMP: Condensed Matter Physics Simulation Using the Geant4 Toolkit
• Confirmation of the spectral excess in DAMIC at SNOLAB with skipper CCDs
• Fast Single-Quantum Measurement with a Multi-Amplifier Sensing Charge-Coupled Device
• Detection of Inelastic Dark Matter via Electron Recoils in SENSEI
• Smart readout of nondestructive image sensors with single-photon sensitivity
• Improving the X-ray energy resolution of a scientific CMOS detector by pixel-level gain correction
• Ghost Imaging of Dark Particles
• Skipper-in-CMOS: Non-Destructive Readout with Sub-Electron Noise Performance for Pixel Detectors
• First results from a multiplexed and massive instrument with sub-electron noise Skipper-CCDs
• Sixteen Multiple-Amplifier Sensing Charge-Coupled Devices and Characterization Techniques Targeting the Next Generation of Astronomical Instruments
• Demonstrating repetitive non-destructive readout (RNDR) with SiSeRO devices
• Multi-Amplifier Sensing Charge-coupled Devices for Next Generation Spectroscopy
• The Skipper CCD for low-energy threshold particle experiments above ground
• Searches for CEνNS and Physics beyond the Standard Model using Skipper-CCDs at CONNIE
• Searching for millicharged particles with 1 kg of Skipper-CCDs using the NuMI beam at Fermilab
• Characterization of the background spectrum in DAMIC at SNOLAB
• Readout Optimization of Multi-Amplifier Sensing Charge-Coupled Devices for Single-Quantum Measurement
• Smart-readout of the Skipper-CCD: Achieving Sub-electron Noise Levels in Regions of Interest
• Analog pile-up circuit technique using a single capacitor for the readout of Skipper-CCD detectors
• Light-tight skipper-CCDs for X-ray detection in space