Experimental setup for Weak Interaction Studies with Radioactive ion-beams WISArD

0574008 - ÚJF 2024 RIV NL eng J - Journal Article
Atanasov, D. - Cresto, F. - Nies, L. - Pomorski, M. - Versteegen, M. - Zákoucký, Dalibor … Total 30 authors
Experimental setup for Weak Interaction Studies with Radioactive ion-beams WISArD.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 1050, MAY (2023), č. článku 168159. ISSN 0168-9002. E-ISSN 1872-9576
R&D Projects: GA MŠMT(CZ) LM2018104
Institutional support: RVO:61389005
Keywords : Weak interaction * Radioactive ion-beams * Geant4 * SIMION
OECD category: Nuclear physics
Impact factor: 1.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.nima.2023.168159

The article describes the commissioning and technical development of the Weak Interaction Studies with 32Ar Decay (WISArD) experiment, installed at the radioactive ion-beam facility ISOLDE/CERN. The experiment aims to extend the present limits on scalar and tensor currents in the weak interaction and hence search for physics beyond the Standard Model. The evaluation of these limits relies on measuring the proton energy in beta-delayed proton emission, sensitive to both the beta-neutrino angular correlation coefficient a ⠌⠗ and the Fierz interference term b. The method tries to improve previous studies by considering the positron-proton coincidences when determining the kinematic shift in the energy of the emitted protons. Using this coincidence technique, the a ⠌⠗ and b coefficients will be measured at the per mil level. Simulations were employed to optimize the ion beam transport efficiency and validate proof-of-principle results obtained in November 2018 (Nov2018). Upgrades are ongoing, and we are looking into improvements to the overall performance of the setup.
Permanent Link: https://hdl.handle.net/11104/0344376