High-spin structure in the transitional nucleus 131Xe: Competitive neutron and proton alignment in the vicinity of the N=82 shell closure (CROSBI ID 253167)
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Podaci o odgovornosti
Kaya, L. ; Vogt, A. ; Reiter, P. ; Siciliano, M. ; Birkenbach, B. ; Blazhev, A. ; Coraggio, L. ; Teruya, E. ; Yoshinaga, N. ; Higashiyama, K. ; Arnswald, K. ; Bazzacco, D. ; Bracco, A. ; Bruyneel, B. ; Corradi, L. ; Crespi, F. C. L. ; de Angelis, G. ; Eberth, J. ; Farnea, E. ; Fioretto, E. ; Fransen, C. ; Fu, B. ; Gadea, A. ; Gargano, A. ; Giaz, A. ; Gorgen, A. ; Gottardo, A. ; Hadynska-Klek, K. ; Hess, H. ; Hetzenegger, R. ; Hirsch, R. ; Itaco, N. ; John, P. R. ; Jolie, J. ; Jungclaus, A. ; Korten, W. ; Leoni, S. ; Lewandowski, L. ; Lunardi, S. ; Menegazzo, R. ; Mengoni, D. ; Michelagnoli, C. ; Mijatović, Tea ; Montagnoli, G. ; Montanari, D. ; Muller-Gatermann, C. ; Napoli, D. ; Podolyak, Zs. ; Pollarolo, G. ; Pullia, A. ; Queiser, M. ; Recchia, F. ; Rosiak, D. ; Saed-Samii, N. ; Sahin, E. ; Scarlassara, F. ; Schneiders, D. ; Seidlitz, M. ; Siebeck, B. ; Smith, J. F. ; Soderstrom, P.-A. ; Stefanini, A. M. ; Steinbach, T. ; Stezowski, O. ; Szilner, Suzana ; Szpak, B. ; Ur, C. ; Valiente-Dobon, J. J. ; Wolf, K. ; Zell, K. O.
engleski
High-spin structure in the transitional nucleus 131Xe: Competitive neutron and proton alignment in the vicinity of the N=82 shell closure
The transitional nucleus 131Xe is investigated after multinucleon transfer in the 136Xe+208Pb and 136Xe+238U reactions employing the high-resolution Advanced γ-Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy, and as an elusive reaction product in the fusion-evaporation reaction 124Sn(11B, p3n)131Xe employing the High-efficiency Observatory for γ-Ray Unique Spectroscopy (HORUS) γ-ray array coupled to a double-sided silicon strip detector at the University of Cologne, Germany. The level scheme of 131Xe is extended to 5 MeV. A pronounced backbending is observed at ℏω≈0.4MeV along the negative-parity one-quasiparticle νh11/2(α=−1/2) band. The results are compared to the high-spin systematics of the Z=54 isotopes and the N=77 isotones. Large-scale shell-model calculations employing the PQM130, SN100PN, GCN50:82, SN100-KTH, and a realistic effective interaction reproduce the experimental findings and provide guidance to elucidate the structure of the high-spin states. Further calculations in 129−132Xe provide insight into the changing nuclear structure along the Xe chain towards the N=82 shell closure. Proton occupancy in the π0h11/2 orbital is found to be decisive for the description of the observed backbending phenomenon.
multinucleon transfer, AGATA gamma array, Large-scale shell-model calculations
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