Ultracold Neutron Energy Spectrum and Storage Properties from Magnetically Induced Spin Depolarization.
Year: 2026
Type: article
Abstract: We present a novel method for extracting the energy spectrum of ultracold neutrons from magnetically induced spin depolarization measurements using the n2EDM apparatus. This method is also used to exploit sensitivity to the storage properties of the materials used to trap ultracold neutrons, specifically, whether collisions are specular or diffuse. To do so, we utilize tomat simulation to map storage properties to correlation times of the ultracold neutrons to induced magnetic nonuniformities. We highlight the sensitivity of this new technique by comparing the two different storage chambers of the n2EDM experiment, which host different ultracold neutron energy spectra. This method should prove to be invaluable to assess systematic effects in experiments utilizing spin-polarized systems with precise magnetic control and long spin-spin coherence time relative to the observation time, such as neutron electric dipole moment and neutron lifetime experiments worldwide.
Source: PubMed
DOI: 10.48620/98798
Authors: Ayres, N J, Ban, G, Bison, G, Bodek, K, Bondar, V, Bouillaud, T, Bowles, D, Caratsch, G L, Chanel, E., Chen, W, Chiu, P-J, Crawford, C B, Czamler, V, Daum, M, Doorenbos, C B, Ferry, M, Fertl, M, Fratangelo, A., Galbinski, D, Griffith, W C, Grujic, Z D, Kirch, K, Kletzl, V, Lauss, B, Lefort, T, Lejuez, A, Li, R, Michielsen, K, Micko, J., Mullan, P, Mullins, A, Naviliat-Cuncic, O, Pais, D, Piegsa, F M, Pignol, G, Pistillo, C., Rebreyend, D, Rienäcker, I, Ries, D, Roccia, S, Rozpedzik, D, Saenz-Arevalo, W, Sanchez-Real Zielniewicz, L, Schmidt-Wellenburg, P, Segarra, E P, Segner, L, Severijns, N, Svirina, K, Tanaka, K S, Thorne, J., Vankeirsbilck, J, von Schickh, N, Yazdandoost, N, Zejma, J, Ziehl, N, Zsigmond, G
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, University of Bern, Institute of Physics Belgrade, European Commission, University of Sussex, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fonds Wetenschappelijk Onderzoek, KU Leuven, Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, Vlaamse regering, Directorate for Mathematical and Physical Sciences, Science and Technology Facilities Council, H2020 European Research Council
Awards: G1069399987, STFC 2021 Particle Physics Review of Experiments and Experimental Consolidated Grants, G129158101, International, Interdisciplinary & Intersectoral Postdoctoral Fellowships at the Paul Scherrer Institut, n2EDM: The next measurement of the neutron electric dipole moment, Precision Physics with Muons and Ultracold Neutrons II, G1780208237, Unique Method for a Neutron Electric Dipole Moment Search using a Pulsed Beam, G1893237010, G2121348967, G2322385174, Search for signals of physics beyond the Standard Model with n2EDM at PSI, The Neutron Electric Dipole Moment: pushing the precision to understand the matter-antimatter asymmetry, G2762820993, n2EDM: The next measurement of the neutron electric dipole moment (II), Spin-spectroscopy with ultracold neutrons - Searching for dark matter and lorentz violation using spin-precessing neutrons, Manetometry for an upgraded n2EDM experiment, Computer-aided food processes for control engineering, A novel neutronics model of the solid D2 ultracold neutron converter at PSI aiming for increasing the source intensity, G3672788121, n2EDM: The next measurement of the neutron electric dipole moment (III), Study of neutronics and its influence on data-analysis and systematics in the n2EDM experiment, G434337789, Toward a measurement of the neutron electric dipole moment, STFC Experimental Particle Physics 2018 Consolidated Grant, G4795914640, G5212786882, Highly accurate vector gradiometers for a next-generation neutron EDM experiment, G5578714457, G5607711389, G5608225264, G5789654617, G5944421943, Quantifying local behavior in high entropy electrostrictive oxides using in situ XAFS, Improving ultracold neutron intensities for frontier precision experiments in fundamental physics, G6209983420, G6237201456, PRECISION MEASUREMENTS WITH NEUTRONS, G6663226171, G7133536890, Cs magnetometer array for the n2EDM experiment, A new search for an electric dipole moment of the neutron with increased sensitivity and an improved UCN source., Low Energy Particle Physics with Cold and Ultracold Neutrons, Systematic Effects in Electric Dipole Searches at the Paul Scherrer Institute, n2EDM: The next measurement of the neutron electric dipole moment (IV), G87242835
OpenAlex ID: W4416753137