Probing Exotic Cross-Shell Interactions at N=28 with Single-Neutron Transfer on 47K
C. J. Paxman,A. Matta,W. N. Catford,G. Lotay,M. Assié,E. Clément,A. Lemasson,D. Ramos,N. A. Orr,F. Galtarossa,V. Girard-Alcindor,J. Dudouet,N. L. Achouri,D. Ackermann,D. Barrientos,D. Beaumel,P. Bednarczyk,G. Benzoni,A. Bracco,L. Canete,B. Cederwall,M. Ciemala,P. Delahaye,D. T. Doherty,C. Domingo-Pardo,B. Fernández-Domínguez,D. Fernández,F. Flavigny,C. Fougères,G. de France,S. Franchoo,A. Gadea,J. Gibelin,V. González,A. Gottardo,N. Goyal,F. Hammache,L. J. Harkness-Brennan,D. S. Harrouz,B. Jacquot,D. S. Judson,A. Jungclaus,A. Kaşkaş,W. Korten,M. Labiche,L. Lalanne,C. Lenain,S. Leoni,J. Ljungvall,J. Lois-Fuentes,T. Lokotko,A. Lopez-Martens,A. Maj,F. M. Marqués,I. Martel,R. Menegazzo,D. Mengoni,B. Million,J. Nyberg,R. M. Pérez-Vidal,L. Plagnol,Zs. Podolyák,A. Pullia,B. Quintana,D. Regueira-Castro,P. Reiter,M. Rejmund,K. Rezynkina,E. Sanchis,M. Şenyiğit,N. de Séréville,M. Siciliano,D. Sohler,O. Stezowski,J. -C. Thomas,A. Utepov,J. J. Valiente-Dobón,D. Verney,M. Zielińska
arxiv（2024）
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摘要
We present the first measurement of the ^47K(d,pγ)^48K transfer reaction, performed in inverse kinematics using a reaccelerated beam of ^47K. The level scheme of ^48K 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 π s^ 1_1/2 d^ 4_3/2 and π s^ 2_1/2 d^ 3_3/2 proton configurations in ^48K is not correctly described using current interactions, challenging our descriptions of light N=28 nuclei.
