1. High-spin structures in Xe 132 and Xe 133 and evidence for isomers along the N=79 isotones
- Author
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Vogt, A, Siciliano, M, Birkenbach, B, Reiter, P, Hadyńska-Klȩk, K, Wheldon, C, Valiente-Dobón, JJ, Teruya, E, Yoshinaga, N, Arnswald, K, Bazzacco, D, Blazhev, A, Bracco, A, Bruyneel, B, Chakrawarthy, RS, Chapman, R, Cline, D, Corradi, L, Crespi, FCL, Cromaz, M, De Angelis, G, Eberth, J, Fallon, P, Farnea, E, Fioretto, E, Fransen, C, Freeman, SJ, Fu, B, Gadea, A, Gelletly, W, Giaz, A, Görgen, A, Gottardo, A, Hayes, AB, Hess, H, Hetzenegger, R, Hirsch, R, Hua, H, John, PR, Jolie, J, Jungclaus, A, Karayonchev, V, Kaya, L, Korten, W, Lee, IY, Leoni, S, Liang, X, Lunardi, S, MacChiavelli, AO, Menegazzo, R, Mengoni, D, Michelagnoli, C, Mijatović, T, Montagnoli, G, Montanari, D, Müller-Gatermann, C, Napoli, D, Pearson, CJ, Podolyák, Z, Pollarolo, G, Pullia, A, Queiser, M, Recchia, F, Regan, PH, Régis, JM, Saed-Samii, N, Şahin, E, Scarlassara, F, Seidlitz, M, Siebeck, B, Sletten, G, Smith, JF, Söderström, PA, Stefanini, AM, Stezowski, O, Szilner, S, Szpak, B, Teng, R, Ur, C, Warner, DD, Wolf, K, Wu, CY, and Zell, KO
- Abstract
The transitional nuclei Xe132 and Xe133 are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) in Xe136+Pb208 MNT reactions employing the high-resolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (ii) in the Xe136+Pt198 MNT reaction employing the GAMMASPHERE spectrometer in combination with the gas-detector array CHICO, and (iii) as an evaporation residue after a Te130(α,xn)Xe134-xn fusion-evaporation reaction employing the HORUS γ-ray array at the University of Cologne. The high-spin level schemes are considerably extended above the Jπ=(7-) and (10+) isomers in Xe132 and above the 11/2- isomer in Xe133. The results are compared to the high-spin systematics of the Z=54 as well as the N=78 and N=79 chains. Furthermore, evidence is found for a long-lived (T1/2â‰1μs) isomer in Xe133 which closes a gap along the N=79 isotones. Shell-model calculations employing the SN100PN and PQM130 effective interactions reproduce the experimental findings and provide guidance to the interpretation of the observed high-spin features.
- Published
- 2017