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(alpha,xn)Xe134-xn fusion-evaporation reaction employing the HORUS gamma-ray array at the University of Cologne. The high-spin level schemes are considerably extended above the Jpi=(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 (T1/2>>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.
High-spin structures in Xe 132 and Xe 133 and evidence for isomers along the N=79 isotones / A. Vogt, M. Siciliano, B. Birkenbach, P. Reiter, K. Hadyńska-Klȩk, 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. Cromaz, G. De Angelis, J. Eberth, P. Fallon, E. Farnea, E. Fioretto, C. 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. Napoli, C.J. Pearson, Z. Podolyák, G. Pollarolo, A. Pullia, M. Queiser, F. Recchia, P.H. Regan, J.-. Régis, N. Saed-Samii, E. Şahin, F. Scarlassara, M. Seidlitz, B. Siebeck, G. Sletten, J.F. Smith, P.-. 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. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 96:2(2017), pp. 024321.1-024321.14.
High-spin structures in Xe 132 and Xe 133 and evidence for isomers along the N=79 isotones
A. Bracco;F.C.L. Crespi;A. Giaz;S. Leoni;D. Montanari;A. Pullia;
2017
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(alpha,xn)Xe134-xn fusion-evaporation reaction employing the HORUS gamma-ray array at the University of Cologne. The high-spin level schemes are considerably extended above the Jpi=(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 (T1/2>>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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