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High-spin structure in the transitional nucleus 1 131Xe: Competitive neutron and proton alignment in the vicinity of the N = 82 shell closure

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, de Angelis, G, Eberth, J, Farnea, E, Fioretto, E, Fransen, C, Fu, B, Gadea, A, Gargano, A, Giaz, A, Görgen, A, Gottardo, A, Hadynska-Klek, Katarzyna, Hess, H, Hetzenegger, R, Hirsch, R, Itaco, N, John, P, Jolie, J, Jungclaus, A, Korten, W, Leoni, S, Lewandowski, L, Lunardi, S, Menegazzo, R, Mengoni, D, Michelagnoli, C, Mijatović, T, Montagnoli, G, Montanari, D, Müller-Gatermann, C, Napoli, D, Podolyak, Zsolt, Pollarolo, G, Pullia, A, Queiser, M, Recchia, F, Rosiak, D, Saed-Samii, N, Şahin, E, Scarlassara, F, Schneiders, D, Seidlitz, M, Siebeck, B, Smith, J, Söderström, P-A, Stefanini, A, Steinbach, T, Stezowski, O, Szilner, S, Szpak, B, Ur, C, Valiente-Dobón, J, Wolf, K and Zell, K (2018) High-spin structure in the transitional nucleus 1 131Xe: Competitive neutron and proton alignment in the vicinity of the N = 82 shell closure Physical Review C, 98 (1), 014309.

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The transitional nucleus 131Xe is investigated after multinucleon transfer (MNT) in the 136Xe+208Pb and 136Xe+238U reactions employing the high-resolution Advanced GAmma 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 HORUS γ-ray array coupled to a double-sided silicon strip detector (DSSSD) at the University of Cologne, Germany. The level scheme of 131Xe is extended to 5 MeV. A pronounced backbending is observed at ~ω ≈ 0.4 MeV 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 (LSSM) 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 π 0h11/2 orbital is found to be decisive for the description of the observed backbending phenomenon.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
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
de Angelis, G
Eberth, J
Farnea, E
Fioretto, E
Fransen, C
Fu, B
Gadea, A
Gargano, A
Giaz, A
Görgen, A
Gottardo, A
Hess, H
Hetzenegger, R
Hirsch, R
Itaco, N
John, P
Jolie, J
Jungclaus, A
Korten, W
Leoni, S
Lewandowski, L
Lunardi, S
Menegazzo, R
Mengoni, D
Michelagnoli, C
Mijatović, T
Montagnoli, G
Montanari, D
Müller-Gatermann, C
Napoli, D
Pollarolo, G
Pullia, A
Queiser, M
Recchia, F
Rosiak, D
Saed-Samii, N
Şahin, E
Scarlassara, F
Schneiders, D
Seidlitz, M
Siebeck, B
Smith, J
Söderström, P-A
Stefanini, A
Steinbach, T
Stezowski, O
Szilner, S
Szpak, B
Ur, C
Valiente-Dobón, J
Wolf, K
Zell, K
Date : 6 July 2018
Funders : European Union Seventh Framework Programme, STFC
DOI : 10.1103/PhysRevC.98.014309
Copyright Disclaimer : Copyright 2018 American Physical Society
Depositing User : Melanie Hughes
Date Deposited : 28 Jun 2018 12:58
Last Modified : 11 Dec 2018 11:24

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