High-spin structure of 134Xe

A. Vogt, B. Birkenbach, P. Reiter, A. Blazhev, M. Siciliano, J. J. Valiente-Dobón, C. Wheldon, D. Bazzacco, M. Bowry, A. Bracco, B. Bruyneel, R. S. Chakrawarthy, R. Chapman, D. Cline, L. Corradi, F. C. L. Crespi, M. Cromaz, G. de Angelis, J. Eberth, P. FallonE. Farnea, E. Fioretto, S. J. Freeman, A. Gadea, K. Geibel, W. Gelletly, A. Gengelbach, A. Giaz, A. Görgen, A. Gottardo, A. B. Hayes, H. Hess, H. Hua, P. R. John, J. Jolie, A. Jungclaus, 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, D. Napoli, C. J. Pearson, L. Pellegri, Zs. Podolyák, G. Pollarolo, A. Pullia, F. Radeck, F. Recchia, P. H. Regan, E. Şahin, F. Scarlassara, G. Sletten, J. F. Smith, P.-A. Söderström, A. M. Stefanini, T. Steinbach, O. Stezowski, S. Szilner, B. Szpak, R. Teng, C. Ur, V. Vandone, D. Ward, D. D. Warner, A. Wiens, C. Y. Wu

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Abstract

Detailed spectroscopic information on the ∼ 82 nuclei is necessary to benchmark shell-model calculations in the region. The nuclear structure above long-lived isomers in 134Xe is investigated after multinucleon transfer (MNT) and actinide fission. Xenon-134 was populated as (i) a transfer product in 136Xe+238U and 136Xe+208Pb MNT reactions and (ii) as a fission product in the 136Xe+238U reaction employing the high-resolution Advanced Gamma Tracking Array (AGATA). Trajectory reconstruction has been applied for the complete identification of beamlike transfer products with the magnetic spectrometer PRISMA. The 136Xe+198Pt MNT reaction was studied with the γ-ray spectrometer GAMMASPHERE in combination with the gas detector array Compact Heavy Ion Counter (CHICO). Several high-spin states in 134Xe on top of the two long-lived isomers are discovered based on γγ-coincidence relationships and information on the γ-ray angular distributions as well as excitation energies from the total kinetic energy loss and fission fragments. The revised level scheme of 134Xe is extended up to an excitation energy of 5.832 MeV with tentative spin-parity assignments up to 16+. Previous assignments of states above the 7 isomer are revised. Latest shell-model calculations employing two different effective interactions reproduce the experimental findings and support the new spin and parity assignments.
Original languageEnglish
Pages (from-to)054325
Number of pages1
JournalPhysical Review C
Volume93
Issue number5
DOIs
Publication statusPublished - 25 May 2016

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