Naslov
First in-beam gamma-ray study of the level structure of neutron-rich 39S

Autori
Chapman, R. ; Wang, Z. M. ; Bouhelal, M. ; Haas, F. ; Liang, X. ; Azaiez, F. ; Behera, B. R. ; Burns, M. ; Caurier, E. ; Corradi, L. ; Curien, D. ; Deacon, A. N. ; Dombradi, Zs. ; Farnea, E. ; Fioretto, E. ; Gadea, A. ; Hodsdon, A. ; Ibrahim, F. ; Jungclaus, A. ; Keyes, K. ; Kumar, V. ; Lunardi, S. ; Marginean, N. ; Montagnoli, G. ; Napoli, D. R. ; Nowacki, F. ; Ollier, J. ; O'Donnell, D. ; Papenberg, A. ; Pollarolo, G. ; Salsac, M.-D. ; Scarlassara, F. ; Smith, J. F. ; Spohr, K. M. ; Stanoiu, M. ; Stefanini, A. M. ; Szilner, Suzana ; Trotta, M. ; Verney, D.

Izvornik
Physical Review C (2469-9993) 94 (2016), 2; 024325, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nuclear structure ; transfer reaction ; particle-core coupling

Sažetak
The neutron-rich S39 nucleus has been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of S36 ions with a thin Pb208 target. The magnetic spectrometer, PRISMA, and the γ-ray array, CLARA, were used in the measurements. Gamma-ray transitions of the following energies were observed: 339, 398, 466, 705, 1517, 1656, and 1724 keV. Five of the observed transitions have been tentatively assigned to the decay of excited states with spins up to (11/2−). The results of a state-of-the-art shell-model calculation of the level scheme of S39 using the SDPF-U effective interaction are also presented. The systematic behavior of the excitation energy of the first 11/2− states in the odd-A isotopes of sulfur and argon is discussed in relation to the excitation energy of the first excited 2+ states of the adjacent even-A isotopes. The states of S39 that have the components in their wave functions corresponding to three neutrons in the 1f7/2 orbital outside the N=20 core have also been discussed within the context of the 0 ℏω shell-model calculations presented here.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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