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Study of unbound excited states in 50,52Ar and the shell closures at N = 32 and N = 34
Institute of Physics, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary; HUN-REN ATOMKI, PO Box 51, H-4001 Debrecen, Hungary.ORCID iD: 0009-0006-3405-1932
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Science and Engineering.ORCID iD: 0000-0003-0212-7497
Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
Number of Authors: 802026 (English)In: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 53, no 7, article id 075104Article in journal (Refereed) Published
Abstract [en]

Neutron-unbound states in 50Ar and 52Ar were investigated via the (p,2p) proton-knockout reaction using the invariant-mass spectroscopy technique. Two (50Ar) and three (52Ar) distinct, narrow resonances were observed in the vicinity of the neutron separation energy. Based on a comparison with theoretical level schemes and calculated (p,2p) cross sections, tentative spin-parity assignments have been proposed. The good degree of consistency between the predicted level structures and the observed states indicates that the large N = 32 and N = 34 shell gaps inherent in the theoretical calculations accurately describe the nuclear structure in this region. These results provide further support for the robustness of these subshell closures in the neutronrich argon isotopes

Place, publisher, year, edition, pages
IOP Publishing , 2026. Vol. 53, no 7, article id 075104
Keywords [en]
Nuclear structure, Proton knock-out reaction, Shell closure, invariant mass method
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-386049DOI: 10.1088/1361-6471/ae7fa3ISI: 001817128700001Scopus ID: 2-s2.0-105044470710OAI: oai:DiVA.org:kth-386049DiVA, id: diva2:2087947
Note

QC 20260723

Available from: 2026-07-23 Created: 2026-07-23 Last updated: 2026-07-23Bibliographically approved

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Aktas, Özge

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