Evidence for octupole collectivity in 172Pt

Ertoprak, A.; Cederwall, B.; Qi, C.; Aktas, Ö.; Doncel, M.; Hadinia, B.; Liotta, R.; Sandzelius, M.; Scholey, C.; Andgren, K.; Bäck, T.; Badran, H.; Braunroth, T.; Calverley, T.; Cox, D. M.; Cullen, D. M.; Fang, Y. D.; Ganioğlu, E.; Giles, M.; Gomez Hornillos, M. B.; Grahn, T.; Greenlees, P. T.; Hilton, J.; Hodge, D.; Ideguchi, E.; Jakobsson, U.; Johnson, A.; Jones, P. M.; Julin, R.; Juutinen, S.; Ketelhut, S.; Khaplanov, A.; Kumar Raju, M.; Leino, M.; Li, H.; Liu, H.; Matta, S.; Modamio, V.; Nara Singh, B. S.; Niikura, M.; Nyman, M.; Özgür, I.; Page, R. D.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Paul, E. S.; Petrache, C. M.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sarén, J.; Sorri, J.; Stolze, S.; Subramaniam, P.; Taylor, M. J.; Uusitalo, J.; Valiente-Dobón, J. J.; Wyss, R.

doi:10.1140/epja/s10050-020-00071-6

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Ertoprak, A.; Cederwall, B.; Qi, C.; Aktas, Ö.; Doncel, M.; Hadinia, B.; Liotta, R.; Sandzelius, M.; Scholey, C.; Andgren, K.; Bäck, T.; Badran, H.; Braunroth, T.; Calverley, T.; Cox, D. M. et al. (2020). Evidence for octupole collectivity in 172Pt. European Physical Journal A, 56 (2), 65. DOI: 10.1140/epja/s10050-020-00071-6

Published in

European Physical Journal A

Authors

Ertoprak, A. |

Cederwall, B. |

Qi, C. |

Aktas, Ö. |

Doncel, M. |

Hadinia, B. |

Liotta, R. |

Sandzelius, M. |

Scholey, C. |

Andgren, K. |

Bäck, T. |

Badran, H. |

Braunroth, T. |

Calverley, T. |

Cox, D. M. |

Cullen, D. M. |

Fang, Y. D. |

Ganioğlu, E. |

Giles, M. |

Gomez Hornillos, M. B. |

Grahn, T. |

Greenlees, P. T. |

Hilton, J. |

Hodge, D. |

Ideguchi, E. |

Jakobsson, U. |

Johnson, A. |

Jones, P. M. |

Julin, R. |

Juutinen, S. |

Ketelhut, S. |

Khaplanov, A. |

Kumar Raju, M. |

Leino, M. |

Li, H. |

Liu, H. |

Matta, S. |

Modamio, V. |

Nara Singh, B. S. |

Niikura, M. |

Nyman, M. |

Özgür, I. |

Page, R. D. |

Pakarinen, J. |

Papadakis, P. |

Partanen, J. |

Paul, E. S. |

Petrache, C. M. |

Peura, P. |

Rahkila, P. |

Ruotsalainen, P. |

Sarén, J. |

Sorri, J. |

Stolze, S. |

Subramaniam, P. |

Taylor, M. J. |

Uusitalo, J. |

Valiente-Dobón, J. J. |

Wyss, R.

Date

2020

Copyright

Excited states in the extremely neutron-deficient nucleus 172Pt were populated via 96Ru(78Kr, 2p) and 92Mo(83Kr, 3n) reactions. The level scheme has been extended up to an excitation energy of ≈ 5 MeV and tentative spin-parity assignments up to I π = 18+. Linear polarization and angular distribution measurements were used to determine the electromagnetic E1 character of the dipole transitions connecting the positive-parity ground-state band with an excited side-band, firmly establishing it as a negativeparity band. The lowest member of this negative-parity structure was firmly assigned spin-parity 3−. In addition, we observed an E3 transition from this 3− state to the ground state, providing direct evidence for octupole collectivity in 172Pt. Large-scale shell model (LSSM) and total Routhian surface (TRS) calculations have been performed, supporting the interpretation of the 3− state as a collective octupolevibrational state.

Publisher

Springer

ISSN Search the Publication Forum

1434-6001

Additional information about funding

Open access funding provided by Royal Institute of Technology. The authors thank the staff at the Accelerator Laboratory at the University of Jyväskylä for excellent technical support. This work was supported through EURONS (European Commission Contract no. RII3-CT-2004-506065) and by the Academy of Finland under the Finnish Centre of Excellence Programme. Further support for this work has been p ... showmore

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