Explanipedia

Ultra-pure Nickel for Structural Components of Low-Radioactivity Instruments Open

T. Roosendaal, C.T Overman, G.S Ortega, Tyler D. Schlieder, Nicole Rocco , et al. · 2025

The next generation of rare-event search experiments in nuclear and particle physics demand structural materials combining exceptional mechanical strength with ultra-low levels of radioactive contamination. This study evaluates chemical va…

Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system Open

A. Anker, P. A. Breur, B. Mong, P. Acharya, A. Amy , et al. · 2025

Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter Open

G. Richardson, B.G Lenardo, D. Gallacher, R. Saldanha, Pramod Acharya , et al. · 2025

We study the sensitivity of nEXO to solar neutrino charged-current interactions, $ν_e + ^{136}$Xe$\rightarrow ^{136}$Cs$^* + e^-$, as well as analogous interactions predicted by models of fermionic dark matter. Due to the recently observed…

Light dark matter constraints from SuperCDMS HVeV detectors operated underground with an anticoincidence event selection Open

M. F. Albakry, I. Alkhatib, David Alonso-González, D. W. P. Amaral, J. Anczarski , et al. · 2025

This article presents constraints on dark-matter-electron interactions obtained from the first underground data-taking campaign with multiple SuperCDMS HVeV detectors operated in the same housing. An exposure of 7.63 g−days is used to set…

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…

Supernova electron-neutrino interactions with xenon in the nEXO detector Open

S. Hedges, S. Al Kharusi, Evan Angelico, J. Brodsky, G. Richardson , et al. · 2024

Electron-neutrino charged-current interactions with xenon nuclei were modeled in the nEXO neutrinoless double-β decay detector (∼5 metric ton, 90% Xe136, 10% Xe134) to evaluate its sensitiv…

Overcoming photobleaching in imaging of single barium atoms in a solid xenon matrix Open

M. Yvaine, D. Fairbank, Johan Söderström, Christopher D. Taylor, J Stanley , et al. · 2024

Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is Xe136, which would double beta decay into…

Spectroscopic Measurements and Models of Energy Deposition in the Substrate of Quantum Circuits by Natural Ionizing Radiation Open

Joseph W. Fowler, Paul Szypryt, R. Bunker, Ellen R. Edwards, I. M. Fogarty Florang , et al. · 2024

Naturally occurring background radiation is a potential source of correlated decoherence events in superconducting qubits that will challenge error-correction schemes. In order to characterize the radiation environment in an unshielded lab…

Abatement of ionizing radiation for superconducting quantum devices Open

B. Loer, P. M. Harrington, Brian C. Archambault, Erin Fuller, Bruce Pierson , et al. · 2024

Ionizing radiation has been shown to reduce the performance of superconducting quantum circuits. In this report, we evaluate the expected contributions of different sources of ambient radioactivity for typical superconducting qubit experim…

Imaging of single barium atoms in a second matrix site in solid xenon for barium tagging in a $^{136}$Xe double beta decay experiment Open

M. Yvaine, D. Fairbank, J Soderstrom, Christopher D. Taylor, J Stanley , et al. · 2024

Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is $^{136}$Xe, which would double beta decay into $^{136}$Ba. Detecti…

G4CMP: Condensed matter physics simulation using the G$\\scriptsize{\\mathrm{EANT}}$4 toolkit Open

M.H. Kelsey, R. Agnese, Y. F. Alam, I. Ataee Langroudy, E. Azadbakht , et al. · 2024

G4CMP simulates phonon and charge transport in cryogenic semiconductor crystals using the Geant4 toolkit. The transport code is capable of simulating the propagation of acoustic phonons as well as electron and hole charge carriers. Herein …

Report from the Workshop on Xenon Detector $0νββ$ Searches: Steps Towards the Kilotonne Scale Open

Arthur Anker, A. Avasthi, M. Brodeur, T. Brunner, N. K. Byrnes , et al. · 2024

These proceedings summarize the program and discussions of the ``Workshop on Xenon Detector $0νββ$ Searches: Steps Towards the Kilotonne Scale'' held on October 25-27 2023 at SLAC National Accelerator Laboratory. This workshop brought toge…

Spectroscopic measurements and models of energy deposition in the substrate of quantum circuits by natural ionizing radiation Open

Joseph W. Fowler, Paul Szypryt, R. Bunker, Ellen R. Edwards, Ian Fogarty Florang , et al. · 2024

Naturally occurring background radiation is a source of correlated decoherence events in superconducting qubits that will challenge error-correction schemes. To characterize the radiation environment in an unshielded laboratory, we perform…

Abatement of Ionizing Radiation for Superconducting Quantum Devices Open

B. Loer, P. M. Harrington, Brian C. Archambault, Erin Fuller, Bruce Pierson , et al. · 2024

Ionizing radiation has been shown to reduce the performance of superconducting quantum circuits. In this report, we evaluate the expected contributions of different sources of ambient radioactivity for typical superconducting qubit experim…

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…

MAJORANA Collaboration's Experience with Germanium Detectors Open

S. Mertens, N. Abgrall, F.T. Avignone, A.S. Barabash, F.E. Bertrand , et al. · 2023

The goal of the Majorana Demonstrator project is to search for 0νββ decay in 76Ge. Of all candidate isotopes for 0νββ, 76Ge has some of the most favorable characteristics. Germanium detectors are a well established technology, and in searc…

Quantum Information Science and Technology for Nuclear Physics. Input into U.S. Long-Range Planning, 2023 Open

D. Beck, J. Carlson, Zohreh Davoudi, J. A. Formaggio, Sofia Quaglioni , et al. · 2023

In preparation for the 2023 NSAC Long Range Plan (LRP), members of the Nuclear Science community gathered to discuss the current state of, and plans for further leveraging opportunities in, QIST in NP research at the Quantum Information Sc…

Radiation-induced secondary emissions in solid-state devices as a possible contribution to quasiparticle poisoning of superconducting circuits Open

Francisco Ponce, J. L. Orrell, Zheming Wang · 2023

This report estimates the potential for secondary emission processes induced by ionizing radiation to result in the generation of quasiparticles in superconducting circuits. These estimates are based on evaluation of data collected from a …

Report of the 2021 U.S. Community Study on the Future of Particle Physics (Snowmass 2021) Summary Chapter Open

J. N. Butler, R. Sekhar Chivukula, André de Gouvêa, Tao Han, Y. K. Kim , et al. · 2023

The 2021-22 High-Energy Physics Community Planning Exercise (a.k.a. ``Snowmass 2021'') was organized by the Division of Particles and Fields of the American Physical Society. Snowmass 2021 was a scientific study that provided an opportunit…

Snowmass 2021 Underground Facilities & Infrastructure Frontier Report Open

L. Baudis, J. Hall, K. T. Lesko, J. L. Orrell · 2022

The decade since Snowmass 2013 has seen extraordinary progress of high energy physics research performed--or planned for--at underground facilities. Drs. T. Kajita and A.B. McDonald were awarded the 2015 Nobel Prize in Physics for the disc…

Snowmass 2021 Topical Report on Synergies in Research at Underground Facilities Open

C. Curceanu, Derek Elsworth, J. A. Formaggio, J. Harms, D. Robertson , et al. · 2022

This is a Snowmass 2021 Topical Report for the Underground Facilities and Infrastructure Frontier on Synergies in Research at Underground Facilities: A broad range of scientific and engineering research is possible in underground laborator…

Development of a <sup>127</sup>Xe calibration source for nEXO Open

B. G. Lenardo, C. A. Hardy, R. Tsang, J. C. Nzobadila Ondze, A. Piepke , et al. · 2022

We study a possible calibration technique for the nEXO experiment using a 127 Xe electron capture source. nEXO is a next-generation search for neutrinoless double beta decay (0 νββ ) that will use a 5-tonne, monolithic liquid xenon time pr…

Investigating the sources of low-energy events in a SuperCDMS-HVeV detector Open

M. F. Albakry, I. Alkhatib, D. W. P. Amaral, T. Aralis, T. Aramaki , et al. · 2022

Recent experiments searching for sub-GeV/c2 dark matter have observed event excesses close to their respective energy thresholds. Although specic to the individual technologies, the measured excess event rates have been consistently report…

Ionization yield measurement in a germanium CDMSlite detector using photo-neutron sources Open

M. F. Albakry, I. Alkhatib, D. W. P. Amaral, T. Aralis, T. Aramaki , et al. · 2022

Two photo-neutron sources, Y88Be9 and Sb124Be9, have been used to investigate the ionization yield of nuclear recoils in the CDMSlite germanium detectors b…

A Strategy for Low-Mass Dark Matter Searches with Cryogenic Detectors in the SuperCDMS SNOLAB Facility Open

SuperCDMS Collaboration, M. F. Albakry, I. Alkhatib, D. W. P. Amaral, T. Aralis , et al. · 2022

The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, a dark matter search focused on nucleon-coupled dark matter in the 1-5 GeV/c$^2$ mass range. Looking to the future, the Collaboration has developed a set of experience-bas…

A Strategy for Low-Mass Dark Matter Searches with Cryogenic Detectors in\n the SuperCDMS SNOLAB Facility Open

SuperCDMS Collaboration, M. F. Albakry, I. Alkhatib, D. W. P. Amaral, T. Aralis , et al. · 2022

The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, a dark\nmatter search focused on nucleon-coupled dark matter in the 1-5 GeV/c$^2$ mass\nrange. Looking to the future, the Collaboration has developed a set of\nexperience-…

Snowmass2021 Cosmic Frontier White Paper: Calibrations and backgrounds for dark matter direct detection Open

D. Baxter, R. Bunker, S. Shaw, S. Westerdale, I. J. Arnquist , et al. · 2022

Future dark matter direct detection experiments will reach unprecedented levels of sensitivity. Achieving this sensitivity will require more precise models of signal and background rates in future detectors. Improving the precision of sign…

A Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS Open

SuperCDMS Collaboration, Musaab Al-Bakry, I. Alkhatib, Dorian Praia Amaral, T. Aralis , et al. · 2022

In this paper, we present a re-analysis of SuperCDMS data using a profile likelihood approach to search for sub-GeV dark matter particles (DM) through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By co…

Kiloton-scale xenon detectors for neutrinoless double beta decay and other new physics searches Open

Ajit Avasthi, Ted W. Bowyer, C. Bray, T. Brunner, Noelle R. Catarineu , et al. · 2021

We report that large detectors employing xenon are a leading technology in existing and planned searches for new physics, including searches for neutrinoless double beta decay (0νββ) and dark matter. While upcoming detectors will employ ta…

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