A1 Journal article (refereed)
Evidence for octupole collectivity in 172Pt (2020)

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., . . . Wyss, R. (2020). Evidence for octupole collectivity in 172Pt. European Physical Journal A, 56(2), Article 65. https://doi.org/10.1140/epja/s10050-020-00071-6

JYU authors or editors

Publication details

All authors or editors: Ertoprak, A.; Cederwall, B.; Qi, C.; Aktas, Ö.; Doncel, M.; Hadinia, B.; Liotta, R.; Sandzelius, M.; Scholey, C.; Andgren, K.; et al.

Journal or series: European Physical Journal A

ISSN: 1434-6001

eISSN: 1434-601X

Publication year: 2020

Volume: 56

Issue number: 2

Article number: 65

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1140/epja/s10050-020-00071-6

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67909

Abstract

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.

Keywords: nuclear physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 1