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

  • Author(s): 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
  • Zell, KO
  • et al.
Abstract

© 2017 American Physical Society. uk. 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.

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