Low-lying single-particle structure of 17C and the N = 14 sub-shell closure

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PEREIRA-LÓPEZ, X., FERNÁNDEZ-DOMÍNGUEZ, B., DELAUNAY, F., ACHOURI, N.L., ORR, N.A., CATFORD, W.N., ASSIÉ, M., BAILEY, S., BASTIN, B., BLUMENFELD, Y., BORCEA, R., CAAMAÑO, M., CACERES, L., CLÉMENT, 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, T., LAPOUX, V., LAY, J.A., LE CROM, B., LEBLOND, S., LOIS-FUENTES, J., MARQUÉS, F.M., MATTA, A., MORFOUACE, P., MORO, A.M., OTSUKA, T., PANCIN, J., PERROT, L., PIOT, J., POLLACCO, E., RAMOS, D., RODRÍGUEZ-TAJES, C., ROGER, T., ROTARU, F., SÉNOVILLE, M., DE SÉRÉVILLE, N., SMITH, Robin, SORLIN, O., STANOIU, M., STEFAN, I., STODEL, C., SUZUKI, D., SUZUKI, T., THOMAS, J.C., TIMOFEYUK, N., VANDEBROUCK, M., WALSHE, J. and WHELDON, C. (2020). Low-lying single-particle structure of 17C and the N = 14 sub-shell closure. Physics Letters B, 811 (135939), p. 135939. [Article]

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27700:562669

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27700:562669

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Abstract

The first investigation of the single-particle structure of the bound states of 17C, via the C transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of and for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the sub-shell closure. The very small spectroscopic factor found for the ground state is consistent with theoretical predictions and indicates that the strength is carried by unbound states. With a dominant valence neutron configuration and a very low separation energy, the excited state is a one-neutron halo candidate.

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Open Access URL:

https://www.sciencedirect.com/science/article/pii/...

Open Access Version:

Published version

Uncontrolled Keywords:

0105 Mathematical Physics; 0201 Astronomical and Space Sciences; 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; Nuclear & Particles Physics

Page Range:

p. 135939

Identifiers

Identification Number:

10.1016/j.physletb.2020.135939

ORCID: