Beta-delayed neutron spectroscopy of \(^{133}\)In

• Published in: arXiv.org
• Main Authors: Xu, Z Y, Madurga, M, Grzywacz, R, King, T T, Algora, A, Andreyev, A N, Benito, J, Berry, T, Borge, M J G, Costache, C, De Witte, H, Fijalkowska, A, Fraile, L M, Fynbo, H O U, Gottardo, A, Halverson, C, Harkness-Brennan, L J, Heideman, J, Huyse, M, Illana, A, Janiak, Ł, Judson, D S, Korgul, A, Kurtukian-Nieto, T, Lazarus, I, Lică, R, Lozeva, R, Marginean, N, Marginean, R, Mazzocchi, C, Mihai, C, Mihai, R E, Morales, A I, Page, R D, Pakarinen, J, Piersa-Siłkowska, M, Podolyák, Zs, Sarriguren, P, Singh, M, Sotty, Ch, Stepaniuk, M, Tengblad, O, Turturica, A, P Van Duppen, Vedia, V, Viñals, S, Warr, N, Yokoyama, R, Yuan, C X
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 21.03.2023
• Subjects: Beta decay; Ion sources; Physics - Nuclear Experiment
• DOI: 10.48550/arxiv.2303.12173

The decay properties of \(^{133}\)In were studied in detail at the ISOLDE Decay Station (IDS). The implementation of the Resonance Ionization Laser Ion Source (RILIS) allowed separate measurements of its \(9/2^+\) ground state (\(^{133g}\)In) and \(1/2^-\) isomer (\(^{133m}\)In). With the use of \(\beta\)-delayed neutron and \(\gamma\) spectroscopy, the decay strengths above the neutron separation energy were quantified in this neutron-rich nucleus for the first time. The allowed Gamow-Teller transition \(9/2^+\rightarrow7/2^+\) was located at 5.92 MeV in the \(^{133g}\)In decay with a logft = 4.7(1). In addition, several neutron-unbound states were populated at lower excitation energies by the First-Forbidden decays of \(^{133g,m}\)In. We assigned spins and parities to those neutron-unbound states based on the \(\beta\)-decay selection rules, the logft values, and systematics.