Probing exotic cross-shell interactions at N=28 with single-neutron transfer on 47K

• Published in: arXiv.org 2024-09
• Main Authors: Paxman, C J, Matta, A, Catford, W N, Lotay, G, Assié, M, Clément, E, Lemasson, A, Ramos, D, Orr, N A, Galtarossa, F, Girard-Alcindor, V, Dudouet, J, Achouri, N L, Ackermann, D, Barrientos, D, Beaumel, D, Bednarczyk, P, Benzoni, G, Bracco, A, Canete, L, Cederwall, B, Ciemala, M, Delahaye, P, Doherty, D T, Domingo-Pardo, C, Fernández-Domínguez, B, Fernández, D, Flavigny, F, Fougères, C, de France, G, Franchoo, S, Gadea, A, Gibelin, J, González, V, Gottardo, A, Goyal, N, Hammache, F, Harkness-Brennan, L J, Harrouz, D S, Jacquot, B, Judson, D S, Jungclaus, A, Kaşkaş, A, Korten, W, Labiche, M, Lalanne, L, Lenain, C, Leoni, S, Ljungvall, J, Lois-Fuentes, J, Lokotko, T, Lopez-Martens, A, Maj, A, Marqués, F M, Martel, I, Menegazzo, R, Mengoni, D, Million, B, Nyberg, J, Pérez-Vidal, R M, Plagnol, L, Podolyák, Zs, Pullia, A, Quintana, B, Regueira-Castro, D, Reiter, P, Rejmund, M, Rezynkina, K, Sanchis, E, M \c{S}enyiğit, de Séréville, N, Siciliano, M, Sohler, D, Stezowski, O, J -C Thomas, Utepov, A, Valiente-Dobón, J J, Verney, D, Zielińska, M
• Format: Article
• Language: English
• Subjects: Excitation spectra; Inverse kinematics; Spectroscopy
• ISSN: 2331-8422

We present the first measurement of the \(^{47}\)K(\(d,p\gamma\))\(^{48}\)K transfer reaction, performed in inverse kinematics using a reaccelerated beam of \(^{47}\)K. The level scheme of \(^{48}\)K has been greatly extended with nine new bound excited states identified and spectroscopic factors deduced. Detailed comparisons with SDPF-U and SDPF-MU shell-model calculations reveal a number of discrepancies with these results, and a preference for SDPF-MU is found. Intriguingly, an apparent systematic overestimation of spectroscopic factors and a poor reproduction of the energies for 1\(^-\) states suggests that the mixing between the \(\pi s^{\,\,\,1}_{1/2} d^{\,\,\,4}_{3/2}\) and \(\pi s^{\,\,\,2}_{1/2} d^{\,\,\,3}_{3/2}\) proton configurations in \(^{48}\)K is not correctly described using current interactions, challenging our descriptions of light \(N=28\) nuclei.