Energy Calibration of Germanium Detectors for the MAJORANA DEMONSTRATOR

Abstract

The MAJORANA DEMONSTRATOR was a search for neutrinoless double-beta decay ($0\nu \beta \beta$) in the ${}^{76}$Ge isotope. It was staged at the 4850-foot level of the Sanford Underground Research Facility (SURF) in Lead, SD. The experiment consisted of 58 germanium detectors housed in a low background shield and was calibrated once per week by deploying a ${}^{228}$Th line source for 1 to 2 hours. The energy scale calibration determination for the detector array was automated using custom analysis tools. We describe the offline procedure for calibration of the Demonstrator germanium detectors, including the simultaneous fitting of multiple spectral peaks, estimation of energy scale uncertainties, and the automation of the calibration procedure.

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Cited by in corpus (4)

• Exotic dark matter search with the Majorana Demonstrator
• Search for charge nonconservation and Pauli exclusion principle violation with the Majorana Demonstrator
• Final Results of the MAJORANA DEMONSTRATOR's Search for Double-Beta Decay of ${}^{76}$Ge to Excited States of ${}^{76}$Se
• Rare multi-nucleon decays with the full data sets of the Majorana Demonstrator