New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core

M. Balogh; E. Jajčišinová; M. Venhart; A. Herzáň; J. L. Wood; D. T. Joss; F. A. Ali; K. Auranen; S. Bánovská; M. Bírová; R. J. Carroll; D. M. Cox; J. G. Cubiss; T. Davis; M. C. Drummond; P. T. Greenlees; T. Grahn; A. Gredley; J. Henderson; U. Jakobsson; R. Julin; S. Juutinen; G. Kantay; J. Konki; P. Konopka; M. Leino; V. Matoušek; A. K. Mistry; C. G. McPeake; David O'Donnell; R. D. Page; J. Pakarinen; P. Papadakis; J. Partanen; P. Peura; P. Rahkila; P. Ruotsalainen; M. Sandzelius; J. Sarén; B. Saygi; M. Sedlák; D. Seweryniak; C. Scholey; J. Sorri; A. Špaček; S. Stolze; M. Taylor; A. Thornthwaite; J. Uusitalo; M. Veselský; S. Vielhauer; F. P. Wearing

doi:10.1103/PhysRevC.106.064324

New collective structures in ¹⁷⁹Au and their implications for the triaxial deformation of the ¹⁷⁸Pt core

M. Balogh, E. Jajčišinová, M. Venhart^*, A. Herzáň, J. L. Wood, D. T. Joss, F. A. Ali, K. Auranen, S. Bánovská, M. Bírová, R. J. Carroll, D. M. Cox, J. G. Cubiss, T. Davis, M. C. Drummond, P. T. Greenlees, T. Grahn, A. Gredley, J. Henderson, U. JakobssonR. Julin, S. Juutinen, G. Kantay, J. Konki, P. Konopka, M. Leino, V. Matoušek, A. K. Mistry, C. G. McPeake, David O'Donnell, R. D. Page, J. Pakarinen, P. Papadakis, J. Partanen, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, B. Saygi, M. Sedlák, D. Seweryniak, C. Scholey, J. Sorri, A. Špaček, S. Stolze, M. Taylor, A. Thornthwaite, J. Uusitalo, M. Veselský, S. Vielhauer, F. P. Wearing

^*Corresponding author for this work

School of Computing, Engineering and Physical Sciences

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Abstract

The extremely neutron-deficient isotope ¹⁷⁹Au has been studied by a combination of in-beam ϒ-ray and isomeric-decay spectroscopy. For in-beam spectroscopy, the recoil-isomer tagging technique was employed, using the known 3/2^-, T_1/2 = 328 ns isomer. A new rotational band, associated with the unfavored signature band of the 1h_9/2 ⊕ 2 f_7/2 proton-intruder configuration, was revealed. A previously unknown, high-spin isomeric state with an excitation energy of 1743(17) keV and T_1/2 = 2.16(8) μs was discovered. Five decay paths were identified, some of them feeding previously unknown non-yrast excited states, associated with the 1i_13/2 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 1h_9/2 ⊕ 2f_7/2 rotational band is interpreted as due to triaxial deformation of the underlying configuration with β2 ≈ 0.26 and ϒ ≈ 27°. Observed non-yrast states of the positive-parity 1i_13/2 intruder configuration are interpreted as due to triaxial deformation with β₂≈ 0.26 and ϒ ≈ 20°.

Original language	English
Article number	064324
Journal	Physical Review C
Volume	106
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.106.064324
Publication status	Published - 22 Dec 2022

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2022 11 21 Balogh et al Collective acceptedAccepted author manuscript, 1.09 MB

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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

@article{2afecf58016d4291b47429e8287a4430,

title = "New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core",

abstract = "The extremely neutron-deficient isotope 179Au has been studied by a combination of in-beam ϒ-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 ⊕ 2 f7/2 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 ϒ ≈ 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 ϒ ≈ 20°.",

author = "M. Balogh and E. Jaj{\v c}i{\v s}inov{\'a} and M. Venhart and A. Herz{\'a}{\v n} and Wood, {J. L.} and Joss, {D. T.} and Ali, {F. A.} and K. Auranen and S. B{\'a}novsk{\'a} and M. B{\'i}rov{\'a} and Carroll, {R. J.} and Cox, {D. M.} and Cubiss, {J. G.} and T. Davis and Drummond, {M. C.} and Greenlees, {P. T.} and T. Grahn and A. Gredley and J. Henderson and U. Jakobsson and R. Julin and S. Juutinen and G. Kantay and J. Konki and P. Konopka and M. Leino and V. Matou{\v s}ek and Mistry, {A. K.} and McPeake, {C. G.} and David O'Donnell and Page, {R. D.} and J. Pakarinen and P. Papadakis and J. Partanen and P. Peura and P. Rahkila and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and B. Saygi and M. Sedl{\'a}k and D. Seweryniak and C. Scholey and J. Sorri and A. {\v S}pa{\v c}ek and S. Stolze and M. Taylor and A. Thornthwaite and J. Uusitalo and M. Veselsk{\'y} and S. Vielhauer and Wearing, {F. P.}",

year = "2022",

month = dec,

day = "22",

doi = "10.1103/PhysRevC.106.064324",

language = "English",

volume = "106",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Balogh, M, Jajčišinová, E, Venhart, M, Herzáň, A, Wood, JL, Joss, DT, Ali, FA, Auranen, K, Bánovská, S, Bírová, M, Carroll, RJ, Cox, DM, Cubiss, JG, Davis, T, Drummond, MC, Greenlees, PT, Grahn, T, Gredley, A, Henderson, J, Jakobsson, U, Julin, R, Juutinen, S, Kantay, G, Konki, J, Konopka, P, Leino, M, Matoušek, V, Mistry, AK, McPeake, CG, O'Donnell, D, Page, RD, Pakarinen, J, Papadakis, P, Partanen, J, Peura, P, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sarén, J, Saygi, B, Sedlák, M, Seweryniak, D, Scholey, C, Sorri, J, Špaček, A, Stolze, S, Taylor, M, Thornthwaite, A, Uusitalo, J, Veselský, M, Vielhauer, S & Wearing, FP 2022, 'New collective structures in ¹⁷⁹Au and their implications for the triaxial deformation of the ¹⁷⁸Pt core', Physical Review C, vol. 106, no. 6, 064324. https://doi.org/10.1103/PhysRevC.106.064324

TY - JOUR

T1 - New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core

AU - Balogh, M.

AU - Jajčišinová, E.

AU - Venhart, M.

AU - Herzáň, A.

AU - Wood, J. L.

AU - Joss, D. T.

AU - Ali, F. A.

AU - Auranen, K.

AU - Bánovská, S.

AU - Bírová, M.

AU - Carroll, R. J.

AU - Cox, D. M.

AU - Cubiss, J. G.

AU - Davis, T.

AU - Drummond, M. C.

AU - Greenlees, P. T.

AU - Grahn, T.

AU - Gredley, A.

AU - Henderson, J.

AU - Jakobsson, U.

AU - Julin, R.

AU - Juutinen, S.

AU - Kantay, G.

AU - Konki, J.

AU - Konopka, P.

AU - Leino, M.

AU - Matoušek, V.

AU - Mistry, A. K.

AU - McPeake, C. G.

AU - O'Donnell, David

AU - Page, R. D.

AU - Pakarinen, J.

AU - Papadakis, P.

AU - Partanen, J.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Saygi, B.

AU - Sedlák, M.

AU - Seweryniak, D.

AU - Scholey, C.

AU - Sorri, J.

AU - Špaček, A.

AU - Stolze, S.

AU - Taylor, M.

AU - Thornthwaite, A.

AU - Uusitalo, J.

AU - Veselský, M.

AU - Vielhauer, S.

AU - Wearing, F. P.

PY - 2022/12/22

Y1 - 2022/12/22

N2 - The extremely neutron-deficient isotope 179Au has been studied by a combination of in-beam ϒ-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 ⊕ 2 f7/2 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 ϒ ≈ 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 ϒ ≈ 20°.

AB - The extremely neutron-deficient isotope 179Au has been studied by a combination of in-beam ϒ-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 ⊕ 2 f7/2 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 ϒ ≈ 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 ϒ ≈ 20°.

U2 - 10.1103/PhysRevC.106.064324

DO - 10.1103/PhysRevC.106.064324

M3 - Article

SN - 2469-9985

VL - 106

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 064324

ER -

New collective structures in 179Au and their implications for the triaxial deformation of the 178Pt core

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New collective structures in ¹⁷⁹Au and their implications for the triaxial deformation of the ¹⁷⁸Pt core