The Majorana Demonstrator Radioassay Program

Abstract

The MAJORANA collaboration is constructing the MAJORANA DEMONSTATOR at the Sanford Underground Research Facility at the Homestake gold mine, in Lead, SD. The apparatus will use Ge detectors, enriched in isotope \nuc{76}{Ge}, to demonstrate the feasibility of a large-scale Ge detector experiment to search for neutrinoless double beta decay. The long half-life of this postulated process requires that the apparatus be extremely low in radioactive isotopes whose decays may produce backgrounds to the search. The radioassay program conducted by the collaboration to ensure that the materials comprising the apparatus are sufficiently pure is described. The resulting measurements of the radioactive-isotope contamination for a number of materials studied for use in the detector are reported.

arXiv commentto be submitted to NIM

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Cited by in corpus (65)

• Neutrinoless Double-Beta Decay: Status and Prospects
• Search for Zero-Neutrino Double Beta Decay in 76Ge with the Majorana Demonstrator
• NEXO: Neutrinoless double beta decay search beyond $10^{28}$ year half-life sensitivity
• A Search for Neutrinoless Double-Beta Decay in ${}^{76}$Ge with 26 kg-yr of Exposure from the MAJORANA DEMONSTRATOR
• First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons
• Final Result of the MAJORANA DEMONSTRATOR's Search for Neutrinoless Double-$\beta$ Decay in ${}^{76}$Ge
• New limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator
• PandaX-xT: a Multi-ten-tonne Liquid Xenon Observatory at the China Jinping Underground Laboratory
• Low background techniques in bolometers for double-beta decay search
• Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
• Trace radioactive impurities in final construction materials for EXO-200
• Trapped electrons and ions as particle detectors
• Background assessment for the TREX Dark Matter experiment
• A Database for Storing the Results of Material Radiopurity Measurements
• Initial Results from the MAJORANA DEMONSTRATOR
• Use of polyethylene naphthalate as a self-vetoing structural material
• The Majorana Demonstrator calibration system
• Main features of detectors and isotopes to investigate double beta decay with increased sensitivity
• Ge Detectors and $0\nu \beta \beta$: The Search for Double Beta Decay with Germanium Detectors: Past, Present and Future
• Evaluation and mitigation of trace ${}^{210}$Pb contamination on copper surfaces
• Constraints on the decay of ${}^{180m}$Ta
• Ultra-low radioactivity Kapton and copper-Kapton laminates
• Topological background discrimination in the PandaX-III neutrinoless double beta decay experiment
• Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches
• The MAJORANA DEMONSTRATOR Readout Electronics System
• Neutrinoless Double Beta Decay with Germanium Detectors: 10${}^{26}$ yr and Beyond
• Background model for the MAJORANA DEMONSTRATOR
• The Majorana Demonstrator's Search for Double-Beta Decay of ${}^{76}$Ge to Excited States of ${}^{76}$Se
• Abatement of Ionizing Radiation for Superconducting Quantum Devices
• Development of an alpha-particle imaging detector based on a low radioactivity micro-time-projection chamber
• Pathfinder for a High Statistics Search for Missing Energy In Gamma Cascades
• Signal identification with Kalman Filter towards background-free neutrinoless double beta decay searches in gaseous detectors
• The DAMIC-M Low Background Chamber
• LEGEND: The Large Enriched Germanium Experiment for Neutrinoless Double-Beta Decay
• Screener3D: a Gaseous Time Projection Chamber for Ultra-low Radioactive Material Screening
• Ultra-Low Background Germanium Assay at the Boulby Underground Laboratory
• Energy Calibration of Germanium Detectors for the MAJORANA DEMONSTRATOR
• Search for charge nonconservation and Pauli exclusion principle violation with the Majorana Demonstrator
• Signatures of muonic activation in the Majorana Demonstrator
• Mass spectrometric analyses of high performance polymers to assess radiopurity as ultra low background materials for rare event physics detectors
• Copper electroplating for background suppression in the NEWS-G experiment
• ${}^{210}$Pb measurements at the André E. Lalonde AMS Laboratory for the radioassay of materials used in rare event search detectors
• Low Background Materials and Fabrication Techniques for Cables and Connectors in the Majorana Demonstrator
• The Status and Initial Results of the MAJORANA DEMONSTRATOR Experiment
• AlphaCAMM, a Micromegas-based camera for high-sensitivity screening of alpha surface contamination
• Sensitivity of the DARWIN observatory to the neutrinoless double beta decay of ${}^{136}$Xe
• Experimental study of 13C(α,n)16O reactions in the Majorana Demonstrator calibration data
• Final Results of the MAJORANA DEMONSTRATOR's Search for Double-Beta Decay of ${}^{76}$Ge to Excited States of ${}^{76}$Se
• Recent Results from the Majorana Demonstrator
• Study of cosmogenic activation in ${}^{76}$Ge enriched germanium detectors during fabrication and transportation above ground
• An integrated online radioassay data storage and analytics tool for nEXO
• Contamination Control and Assay Results for the Majorana Demonstrator Ultra Clean Components
• The Majorana Demonstrator search for neutrinoless double beta decay
• Characterization of the background spectrum in DAMIC at SNOLAB
• Response of a Liquid ${}^3$He Neutron Detector
• Rare multi-nucleon decays with the full data sets of the Majorana Demonstrator
• Design of high-strength, radiopure copper-chromium alloys for rare-event searches assisted by computational thermodynamics
• A pulsed, compact, low-background X-ray generator
• Feasibility study of SiGHT: a novel ultra low background photosensor for low temperature operation
• An assay-based background projection for the MAJORANA DEMONSTRATOR using Monte Carlo Uncertainty Propagation
• A Novel Manufacturing Process for Glass THGEMs and First Characterisation in an Optical Gaseous Argon TPC
• Treatment of material radioassay measurements in projecting sensitivity for low-background experiments
• Liquid ${}^3$He Detectors for Neutrons
• Enhanced search sensitivity to the double beta decay of ${}^{136}$Xe to excited states with topological signatures
• Study on cosmogenic activation in copper for rare event search experiments