A1 Journal article (refereed)
New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core (2022)

Balogh, M., Jajčišinová, E., Venhart, M., Herzáň, A., Wood, J. L., Joss, D. T., Ali, F. A., Auranen, K., Bánovská, S., Bírová, M., Carroll, R. J., Cox D., M., Cubiss J., G., Davis, T., Drummond M., C., Greenlees, P. T., Grahn, T., Gredley, A., Henderson, J., . . . Wearing, F. P. (2022). New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core. Physical Review C, 106(6), Article 064324. https://doi.org/10.1103/PhysRevC.106.064324

JYU authors or editors

Publication details

All authors or editors: Balogh, M.; Jajčišinová, E.; Venhart, M.; Herzáň, A.; Wood, J. L.; Joss, D. T.; Ali, F. A.; Auranen, K.; Bánovská, S.; Bírová, M.; et al.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2022

Publication date: 22/12/2022

Volume: 106

Issue number: 6

Article number: 064324

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevC.106.064324

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/85687

Abstract

The extremely neutron-deficient isotope 179Au has been studied by a combination of in-beam γ-ray and isomeric-decay spectroscopy. For in-beam spectroscopy, the recoil-isomer tagging technique was employed, using the known 3/2−, T1/2=328 ns isomer. A new rotational band, associated with the unfavored signature band of the 1h9/2⊕2f7/2 proton-intruder configuration, was revealed. A previously unknown, high-spin isomeric state with an excitation energy of 1743(17) keV and T1/2=2.16(8)µs was discovered. Five decay paths were identified, some of them feeding previously unknown non-yrast excited states, associated with the 1i13/2 proton-intruder configuration. Calculations based on the particle-plus-triaxial-rotor model were performed to interpret the data. On the basis of these calculations, the new 1h9/2⊕2f7/2 rotational band is interpreted as due to triaxial deformation of the underlying configuration with β2≈0.26 and γ≈27∘. Observed non-yrast states of the positive-parity 1i13/2 intruder configuration are interpreted as due to triaxial deformation with β2≈0.26 and γ≈20∘.

Keywords: nuclear physics; isotopes; gold; platinum

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2022

JUFO rating: 2