Probing Exotic Cross-Shell Interactions at with Single-Neutron Transfer on

Paxman, C. ???j.; Matta, A.; Catford, W. ???n.; Lotay, G.; Assi??, M.; Cl??ment, 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.; Fern??ndez-Dom??nguez, B.; Fern??ndez, D.; Flavigny, F.; Foug??res, C.; De France, G.; Franchoo, S.; Gadea, A.; Gibelin, J.; Gonz??lez, V.; Gottardo, A.; Goyal, N.; Hammache, F.; Harkness-Brennan, L. ???j.; Harrouz, D. ???s.; Jacquot, B.; Judson, D. ???s.; Jungclaus, A.; Ka??ka??, A.; Korten, W.; Labiche, M.; Lalanne, L.; Lenain, C.; Leoni, S.; Ljungvall, J.; Lois-Fuentes, J.; Lokotko, T.; Lopez-Martens, A.; Maj, A.; Marqu??s, F. ???m.; Martel, I.; Menegazzo, R.; Mengoni, D.; Million, B.; Nyberg, J.; P??rez-Vidal, R. ???m.; Plagnol, L.; Podoly??k, Zs.; Pullia, A.; Quintana, B.; Regueira-Castro, D.; Reiter, P.; Rejmund, M.; Rezynkina, K.; Sanchis, E.; ??enyi??it, M.; De S??r??ville, N.; Siciliano, M.; Sohler, D.; Stezowski, O.; Thomas, J. -C.; Utepov, A.; Valiente-Dob??n, J. ???j.; Verney, D.; Zieli??ska, M.

doi:10.1103/physrevlett.134.162504

We present the first measurement of the K47(d,pγ)K48 transfer reaction, performed in inverse kinematics using a reaccelerated beam of K47. The level scheme of K48 has been greatly extended, with nine new bound excited states identified and spectroscopic factors deduced. Uniquely, the K47(d,p) reaction gives access to nuclear states that are sensitive to the interaction of protons and neutrons in the widely spaced 1s and fp orbitals, respectively. Detailed comparisons with SDPF-U and SDPF-MU shell-model calculations reveal a number of discrepancies between theory and experiment. Intriguingly, a systematic overestimation of spectroscopic factors and a poor reproduction of the energies for 1- states suggests that the mixing between the πs1/21d3/24 and πs1/22d3/23 proton configurations in K48 is not correctly described using current interactions, challenging our description of light nuclei around the N=28 island of inversion.