Isomers and high-spin structures in the N=81 isotones Xe135 and Ba137

6533b7d8fe1ef96bd126b574

RESEARCH PRODUCT

Isomers and high-spin structures in the N=81 isotones Xe135 and Ba137

L. Kaya M. Siciliano A. Gengelbach B. Birkenbach P. Fallon Herbert Hess Agnese Giaz W. Korten X. Liang D. Bazzacco A. Bracco Luna Pellegri V. Vandone V. Vandone Roberto Menegazzo S. Lunardi S. Lunardi N. Saed-samii B. Bruyneel M. Bowry D. Montanari D. Montanari M. Cromaz C. Y. Wu A. Vogt D. Cline L. Corradi P. H. Regan P. Reiter A. Blazhev K. O. Zell P. R. John W. Gelletly K. Arnswald R. Hirsch R. Teng Alberto Pullia Alberto Pullia G. Sletten J. F. Smith D. Schneiders E. Sahin A. Gadea C. J. Pearson K. Hadynska-klek Robert Chapman G. Montagnoli G. Pollarolo F. Scarlassara F. Scarlassara Naotaka Yoshinaga C. Müller-gatermann O. Stezowski M. Seidlitz F. Radeck E. Fioretto S. Leoni A. O. Macchiavelli E. Teruya T. Mijatović M. Queiser G. De Angelis A. M. Stefanini J. Eberth L. Lewandowski Zs. Podolyák E. Farnea A. Gottardo R. S. Chakrawarthy D. Rosiak P. A. Söderström Andreas Görgen H. Hua A. B. Hayes J. J. Valiente-dobón C. Wheldon D. R. Napoli K. Geibel D. Mengoni B. Fu J. Jolie A. Jungclaus S. Szilner F. C. L. Crespi D. D. Warner S. J. Freeman T. Steinbach C. A. Ur F. Recchia F. Recchia B. Szpak Andreas Wiens I. Y. Lee C. Michelagnoli B. Siebeck

subject

Physics Spectrometer 010308 nuclear & particles physics 0103 physical sciences Quadrupole SHELL model Gammasphere AGATA Atomic physics 010306 general physics Spin (physics)01 natural sciences

description

The high-spin structures of the N = 81 isotones 135Xe and 137Ba are investigated after multinucleontransfer (MNT) and fusion-evaporation reactions. Both nuclei are populated in (i) 136Xe+238U and (ii) 136Xe+208Pb MNT reactions employing the high-resolution Advanced Gamma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (iii), in the 136Xe+198Pt MNT reaction employing the -ray array GAMMASPHERE in combination with the gas detector array Chico, and (iv) via a 11B+130Te fusion-evaporation reaction. The high-spin level schemes of 135Xe and 137Ba are considerably extended to higher energies. The 2058-keV (19=2 ) state in 135Xe is identified as an isomer, completing the systematics for the N = 81 isotones. Its half-life is measured to be 8.6(10) ns, corresponding to a transition probability of B(E2; 19=2 ! 15=2 ) = 0:539(69) W.u. Latest shell model calculations considering 132Sn as a closed core reproduce the experimental findings and provide guidance to the interpretation of the new levels. The experimentally deduced reduced quadrupole transition probabilities of the isomeric states are compared to shell-model predictions.

year	journal	country	edition	language
2017-02-15	Physical Review C

https://doi.org/10.1103/physrevc.95.024316