Average Energy Expended Per e-h Pair and Energy Scale Function for Germanium-Based Dark Matter Experiments

Abstract

We report a new result of the temperature-dependent average energy expended per electron-hole (e-h) pair, $\epsilon$, for germanium detectors. Applying energy partition mechanism in ionization for a given energy deposition, the Fano factor and the value of $\epsilon$ can be determined separately. Subsequently, we illustrate the variation of $\epsilon$ as a function of temperature. The impact of $\epsilon$ on the energy threshold and energy scale for germanium detectors at a given temperature is evaluated. We demonstrate an absolute energy scale function of low-energy recoils for germanium detectors in the direct detection of dark matter particles.

24 pages, 8 figures

References in corpus (5)

• Planck 2013 results. I. Overview of products and scientific results
• Search for Low-Mass WIMPs with SuperCDMS
• Results from a Low-Energy Analysis of the CDMS II Germanium Data
• WIMP-Search Results from the Second CDMSlite Run
• Ionization Efficiency Study for Low Energy Nuclear Recoils in Germanium

Cited by in corpus (6)

• Unleashing the full power of LHCb to probe Stealth New Physics
• Direct Detection of MeV-Scale Dark Matter Utilizing Germanium Internal Amplification for the Charge Created by the Ionization of Impurities
• Physics implications of recent Dresden-II reactor data
• Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources
• Development of low-threshold detectors for low-mass dark matter searches with a p-type germanium detector operated at cryogenic temperature
• Bounds on new physics with data of the Dresden-II reactor experiment and COHERENT