Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions

• Published in: Physics letters. B Vol. 809; no. C; p. 135748
• Main Authors: Syndikus, I., Petri, M., Macchiavelli, A.O., Paschalis, S., Bertulani, C.A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J.M., Boretzky, K., Borge, M.J.G., Brown, B.A., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chakraborty, S., Chulkov, L.V., Cortina-Gil, D., Cravo, E., Crespo, R., Datta Pramanik, U., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Farinon, F., Fraile, L.M., Galaviz, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H.T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kröll, T., Kurz, N., Langer, C., Le Bleis, T., Machado, J., Marganiec-Gałązka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V., Perea, A., Pietri, S.B., Plag, R., Rahaman, A., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D.M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wamers, F., Wheldon, C., Wilson, G.L., Winfield, J.S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 10-10-2020; Elsevier
• Subjects: Condensed Matter Physics; Den kondenserade materiens fysik; Exotic nuclei; Fysik; Magic numbers; Natural Sciences; Naturvetenskap; Physical Sciences; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Quasi-free scattering reactions; Shell evolution; Spin-orbit splitting; Subatomic Physics; Subatomär fysik; Tensor force; Shell evolution; Spin-orbit splitting; Tensor force; Exotic nuclei; Magic numbers; Quasi-free scattering reactions
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2020.135748

The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei and understanding the driving mechanism behind the shell evolution. In this work, we investigate the Z=6 spin-orbit shell gap towards the neutron dripline. To do so, we employed NA(p,2p)CA−1 quasi-free scattering reactions to measure the proton component of the 21+ state of 16,18,20C. The experimental findings support the notion of a moderate reduction of the proton 1p1/2−1p3/2 spin-orbit splitting, at variance to recent claims for a prevalent Z=6 magic number towards the neutron dripline.