Explanipedia

The ScIDEP muon radiography project at the Egyptian Pyramid of Khafre Open

Manar Gamal, S. Aly, Dora Geeraerts, Adam Hecht, R. T. Kouzes , et al. · 2025

The ScIDEP Collaboration is constructing muon telescopes based on scintillator technology to investigate the internal structure of the Egyptian Pyramid of Khafre at Giza near Cairo using cosmic-ray muons. The collaboration aims to scan the…

The ScIDEP Muon Radiography Project at the Egyptian Pyramid of Khafre Open

Manar Gamal, S. Aly, Dora Geeraerts, Adam Hecht, R. T. Kouzes , et al. · 2025

The ScIDEP Collaboration is constructing muon telescopes based on scintillator technology to investigate the internal structure of the Egyptian Pyramid of Khafre at Giza near Cairo using cosmic-ray muons. The collaboration aims to scan the…

The MAJORANA DEMONSTRATOR experiment's construction, commissioning, and performance Open

N. Abgrall, E. Aguayo, I. J. Arnquist, F. T. Avignone, A. S. Barabash , et al. · 2025

Background: The MAJORANA DEMONSTRATOR , a modular array of isotopically enriched high-purity germanium (HPGe) detectors, was constructed to demonstrate backgrounds low enough to justify building a tonne-scale experiment to search for the n…

Assay-based background projection for the Majorana Demonstrator using Monte Carlo uncertainty propagation Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2024

The background index (BI) is an important quantity to project and calculate the half-life sensitivity of neutrinoless double-β decay (0νββ) experiments. An analysis framework is presented to calculate the BI using the specific activities, …

An assay-based background projection for the MAJORANA DEMONSTRATOR using Monte Carlo Uncertainty Propagation Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2024

The background index is an important quantity which is used in projecting and calculating the half-life sensitivity of neutrinoless double-beta decay ($0νββ$) experiments. A novel analysis framework is presented to calculate the background…

Interpretable boosted-decision-tree analysis for the Majorana Demonstrator Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2024

The Majorana Demonstrator is a leading experiment searching for neutrinoless double-beta decay with high purity germanium (HPGe) detectors. Machine learning provides a new way to maximize the amount of information provided by these detecto…

Exotic Dark Matter Search with the Majorana Demonstrator Open

I. J. Arnquist, F. T. Avignone, A S Barabash, C. J. Barton, K. H. Bhimani , et al. · 2024

With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the MAJORANA DEMONSTRATOR enable searches for several classes of exotic dark matter (DM) models. In this work, we report new…

Final Result of the Majorana Demonstrator's Search for Neutrinoless Double-𝛽 Decay in Ge76 Open

I. J. Arnquist, F. T. Avignone, A.S. Barabash, C. J. Barton, Paul Barton , et al. · 2024

The MAJORANA DEMONSTRATOR searched for neutrinoless double-β decay (0νββ) of 76Ge using modular arrays of high-purity Ge detectors operated in vacuum cryostats in a low-background shield. The arrays operated with up to 40.4 kg of detectors…

Comments by the Senior Editor Open

G.‐F. Dalla Betta, Adriana Morana, B. Obryk, Maria Grazia Pia, Sara Pozzi , et al. · 2024

The 8th edition of the International Conference on "Advancements in Nuclear Instrumentation Measurement Methods and their Applications" (ANIMMA) was held in Lucca, Italy, on June 12–16, 2023. The ANIMMA-2023 welcomed 403 attendees from 31 …

Exotic Dark Matter Search with the Majorana Demonstrator Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2024

With excellent energy resolution and ultralow-level radiogenic backgrounds, the high-purity germanium detectors in the enable searches for several classes of exotic dark matter (DM) models. In this work, we report new experimental limits o…

Constraints on the Decay of Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2023

^{180m}Ta is a rare nuclear isomer whose decay has never been observed. Its remarkably long lifetime surpasses the half-lives of all other known β and electron capture decays due to the large K-spin differences and small energy differences…

Energy calibration of germanium detectors for the Majorana Demonstrator Open

I.J. Arnquist, F.T. Avignone, A.S. Barabash, C.J. Barton, K.H. Bhimani , et al. · 2023

The Majorana Demonstrator was a search for neutrinoless double-beta decay (0 νββ ) 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 g…

Erratum: Search for Spontaneous Radiation from Wave Function Collapse in the Majorana Demonstrator [Phys. Rev. Lett. <b>129</b>, 080401 (2022)] Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2023

This corrects the article DOI: 10.1103/PhysRevLett.129.080401.

Spectral analysis for the Majorana Demonstrator experiment Open

L. Hehn, N. Abgrall, S.I. Alvis, I. J. Arnquist, F.T. Avignone , et al. · 2023

The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two mo…

Dark matter sensitivities of the Majorana Demonstrator Open

G.K. Giovanetti, E. Aguayo, F.T. Avignone, H.O. Back, A.S. Barabash , et al. · 2023

The Majorana Demonstrator is an array of natural and enriched high purity germanium detectors that will search for the neutrinoless double-beta decay of Germanium-76 and perform a search for weakly interacting massive particles with masses…

The MAJORANA experiment: An ultra-low background search for neutrinoless double-beta decay Open

D.G. Phillips, E. Aguayo, F.T. Avignone, H.O. Back, A.S. Barabash , et al. · 2023

The observation of neutrinoless double-beta decay would resolve the Majorana nature of the neutrino and could provide information on the absolute scale of the neutrino mass. The initial phase of the MAJORANA experiment, known as the DEMONS…

The Majorana project Open

S.R. Elliott, C.E. Aalseth, M. Akashi-Ronquest, M. Amman, J.F. Amsbaugh , et al. · 2023

Building a 0νβ β experiment with the ability to probe neutrino mass in the inverted hierarchy region requires the combination of a large detector mass sensitive to 0νβ β, on the order of 1-tonne, and unprecedented background levels, on the…

Design improvements to cables and connectors in the Majorana Demonstrator Open

C.R. Haufe, A.L. Reine, N. Abgrall, S.I. Alvis, I. J. Arnquist , et al. · 2023

The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two mo…

Progress Toward A 2νββ Measurement for the Majorana Demonstrator Open

T. Gilliss, N. Abgrall, S.I. Alvis, I. J. Arnquist, F.T. Avignone , et al. · 2023

The MAJORANA DEMONSTRATOR is a 76Ge-based neutrinoless double-beta decay (0νββ) experiment. Staged at the 4850 ft level of the Sanford Underground Research Facility, the DEMONSTRATOR operates an array of high-purity p-Type point contact Ge…

Data quality assurance for the Majorana Demonstrator Open

J. Myslik, N. Abgrall, S.I. Alvis, I. J. Arnquist, F.T. Avignone , et al. · 2023

The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a large-scale experiment in a phased and modular fashion. It consists of two …

The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of Germanium-76 Open

J. F. Wilkerson, E. Aguayo, F.T. Avignone, H.O. Back, A.S. Barabash , et al. · 2023

The observation of neutrino less double-beta decay would show that neutrinos are Majorana particles and provide information on neutrino mass. Attaining sensitivities for neutrino masses in the inverted hierarchy region requires large, tonn…

The Majorana Demonstrator Status and Preliminary Results Open

C.-H. Yu, S.I. Alvis, I. J. Arnquist, F.T. Avignone, A.S. Barabash , et al. · 2023

The Majorana Collaboration is using an array of high-purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. Searches for neutrinoless double-beta decay are understood to be the only viable experimental method for testing…

Experimental study of C 13 (α,n) O 16 reactions in the Majorana Demonstrator calibration data Open

I. J. Arnquist, F.T. Avignone, A.S. Barabash, C.J. Barton, K.H. Bhimani , et al. · 2023

Neutron captures and delayed decays of reaction products are common sources of backgrounds in ultrarare event searches. In this work, we studied C13(α,n)O16 reactions induced by α particles emitted within the calibration sources of the Maj…

Search for Neutrinoless Double- β Decay in Ge 76 with the Majorana Demonstrator Open

C.E. Aalseth, C. O'Shaughnessy, N. Abgrall, E. Aguayo, S.I. Alvis , et al. · 2023

The Majorana Collaboration is operating an array of high purity Ge detectors to search for neutrinoless double-β decay in Ge76. The Majorana Demonstrator comprises 44.1 kg of Ge detectors (29.7 kg enriched in Ge76) split between two module…

First Limit on the Direct Detection of Lightly Ionizing Particles for Electric Charge as Low as e/1000 with the Majorana Demonstrator Open

S.I. Alvis, I. J. Arnquist, F.T. Avignone, A.S. Barabash, C.J. Barton , et al. · 2023

The Majorana Demonstrator is an ultralow-background experiment searching for neutrinoless double-beta decay in Ge76. The heavily shielded array of germanium detectors, placed nearly a mile underground at the Sanford Underground Research Fa…

The Majorana Demonstrator readout electronics system Open

N. Abgrall, M. Amman, I. J. Arnquist, F.T. Avignone, A.S. Barabash , et al. · 2023

The Majorana Demonstrator comprises two arrays of high-purity germanium detectors constructed to search for neutrinoless double-beta decay in 76Ge and other physics beyond the Standard Model. Its readout electronics were designed to have l…

α -event characterization and rejection in point-contact HPGe detectors Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, F. E. Bertrand , et al. · 2023

Final Result of the Majorana Demonstrator’s Search for Neutrinoless Double- Decay in Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, Paul Barton , et al. · 2023

The Majorana Demonstrator searched for neutrinoless double-β decay (0νββ) of ^{76}Ge using modular arrays of high-purity Ge detectors operated in vacuum cryostats in a low-background shield. The arrays operated with up to 40.4 kg of detect…

Interpretable boosted-decision-tree analysis for the Majorana Demonstrator Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2023

The MAJORANA DEMONSTRATOR is a leading experiment searching for neutrinoless double-beta decay with high purity germanium (HPGe) detectors. Machine learning provides a new way to maximize the amount of information provided by these detecto…

Search for Solar Axions via Axion-Photon Coupling with the Majorana Demonstrator Open

I. J. Arnquist, F. T. Avignone, A. S. Barabash, C. J. Barton, K. H. Bhimani , et al. · 2022

Axions were originally proposed to explain the strong-CP problem in QCD. Through axion-photon coupling, the Sun could be a major source of axions, which could be measured in solid state detection experiments with enhancements due to cohere…

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