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Title: Energy calibration of germanium detectors for the Majorana Demonstrator

Journal Article · · Journal of Instrumentation

Abstract The Majorana Demonstrator was a search for neutrinoless double-beta decay (0νββ) in the 76Ge 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 228Th 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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of North Carolina, Chapel Hill, NC (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
The Majorana collaboration
Grant/Contract Number:
89233218CNA000001; AC02-05CH11231; AC05-76RL01830; AC05-00OR22725; FG02-97ER41041; FG02-97ER41033
OSTI ID:
2005828
Alternate ID(s):
OSTI ID: 2229283; OSTI ID: 2280631; OSTI ID: 2281978; OSTI ID: 2294168
Report Number(s):
LA-UR-21-27784; PNNL-SA-165183
Journal Information:
Journal of Instrumentation, Vol. 18, Issue 09; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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