1. Cross-shell states in $^{15}$C: a test for p-sd interactions
- Author
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Lois-Fuentes, J., Fernandez-Dominguez, B., Pereira-Lopez, X., Delaunay, F., Catford, W.N., Matta, A., Orr, N.A., Duguet, T., Otsuka, T., Soma, V., Sorlin, O., Suzuki, T., Achouri, N.L., Assie, M., Bailey, S., Bastin, B., Blumenfeld, Y., Borcea, R., Caamano, M., Caceres, L., Clement, E., Corsi, A., Curtis, N., Deshayes, Q., Farget, F., Fisichella, M., de France, G., Franchoo, S., Freer, M., Gibelin, J., Gillibert, A., Grinyer, G.F., Hammache, F., Kamalou, O., Knapton, A., Kokalova, Tz., Lapoux, V., Le Crom, B., Leblond, S., Marques, F.M., Morfouace, P., Pancin, J., Perrot, L., Piot, J., Pollacco, E., Ramos, D., Regueira-Castro, D., Rodriguez-Tajes, C., Roger, T., Rotaru, F., Senoville, M., de Sereville, N., Smith, R., Stanoiu, M., Stefan, I., Stodel, C., Suzuki, D., Thomas, J.C., Timofeyuk, N., Vandebrouck, M., Walshe, J., Wheldon, C., Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Nuclear Theory (nucl-th) ,[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] ,Nuclear Theory ,FOS: Physical sciences ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
International audience; The low-lying structure of $^{15}$C has been investigated via the neutron-removal $^{16}$C$(d,t)$ reaction. Along with bound neutron sd-shell hole states, unbound p-shell hole states have been firmly confirmed. The excitation energies and the deduced spectroscopic factors of the cross-shell states are an important measure of the $[(p)^{-1}(sd)^{2}]$ neutron configurations in $^{15}$C. Our results show a very good agreement with shell-model calculations using the SFO-tls interaction for $^{15}$C. However, a modification of the $p$-$sd$ and $sd$-$sd$ monopole terms was applied in order to reproduce the $N=9$ isotone $^{17}$O. In addition, the excitation energies and spectroscopic factors have been compared to the first calculations of $^{15}$C with the $ab~ initio$ self-consistent Green's function method employing the NNLO$_{sat}$ interaction. The results show the sensitivity to the size of the $N=8$ shell gap and highlight the need of going beyond the current truncation scheme in the theory.
- Published
- 2023
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