High-spin structures in 132Xe and 133Xe and evidence for isomers along the N=79 isotones

A. Vogt, M. Siciliano, B. Birkenbach, P. Reiter, K. Hadynska-Klek, C. Wheldon, J. J. Valiente-Dobón, E. Teruya, N. Yoshinaga, K. Arnswald, D. Bazzacco, A. Blazhev, A. Bracco, B. Bruyneel, R. S. Chakrawarthy, R. Chapman, D. Cline, L. Corradi, F. C. L. Crespi, M. CromazG. de Angelis, J. Eberth, P. Fallon, E. Farnea, E. Fioretto, Ch. Fransen, S. J. Freeman, B. Fu, A. Gadea, W. Gelletly, A. Giaz, A. Görgen, A. Gottardo, A. B. Hayes, H. Hess, R. Hetzenegger, R. Hirsch, H. Hua, P. R. John, J Jolie, A. Jungclaus, V. Karayonchev, L. Kaya, W. Korten, I. Y. Lee, S. Leoni, X. Liang, S. Lunardi, A. O. Macchiavelli, R. Menegazzo, D. Mengoni, C. Michelagnoli, T. Mijatović, G. Montagnoli, D. Montanari, C. Müller-Gatermann, D. R. Napoli, C. J. Pearson, Zs. Podolyák, G. Pollarolo, A. Pullia, M. Queiser, F. Recchia, P. H. Regan, J.-M. Régis, N. Saed-Samii, E. Sahin, F. Scarlassara, M. Seidlitz, B. Siebeck, G. Sletten, J. F. Smith, P.~A. Söderström, A. M. Stefanini, O. Stezowski, S. Szilner, B. Szpak, R. Teng, C. Ur, D. D. Warner, K. Wolf, C. Y. Wu, K. O. Zell

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Abstract

The transitional nuclei 132Xe and 133Xe are investigated after multinucleon-transfer (MNT) and fusion-evaporation reactions. Both nuclei are populated (i) in 136Xe+208Pb MNT reactions employing the high-resolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (ii) in the 136Xe+198Pt MNT reaction employing the GAMMASPHERE spectrometer in combination with the gas-detector array CHICO, and (iii) as an evaporation residue after a 130Te(α,xn)134−xnXe 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 132Xe and above the 11/2 isomer in 133Xe. 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 (T1/2≫1μs) isomer in 133Xe 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.
Original languageEnglish
Article number024321
Number of pages14
JournalPhysical Review C
Volume96
DOIs
Publication statusPublished - 24 Aug 2017

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Vogt, A., Siciliano, M., Birkenbach, B., Reiter, P., Hadynska-Klek, K., Wheldon, C., ... Zell, K. O. (2017). High-spin structures in 132Xe and 133Xe and evidence for isomers along the N=79 isotones. Physical Review C, 96, [024321]. https://doi.org/10.1103/PhysRevC.96.024321