Evidence for Octupole Collectivity in 172Pt

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

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

Evidence for Octupole Collectivity in ¹⁷²Pt

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

^*Corresponding author for this work

School of Computing, Engineering and Physical Sciences

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Abstract

Excited states in the extremely neutron-decient 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 negative-parity band. The lowest member of this negative-parity structure was rmly 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 octupole-vibrational state.

Original language	English
Article number	65
Number of pages	9
Journal	The European Physical Journal A
Volume	56
Early online date	20 Feb 2020
DOIs	https://doi.org/10.1140/epja/s10050-020-00071-6
Publication status	E-pub ahead of print - 20 Feb 2020

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2020 01 11 Ertoprak et al Octupole acceptedAccepted author manuscript, 14.3 MB

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Ertoprak, A., Cederwall, B., Qi, C., Aktaş, Ö., Doncel, M., Hadinia, B., Liotta, R., Sandzelius, M., Scholey, C., Andgren, K., Back, 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. The European Physical Journal A, 56, Article 65. Advance online publication. https://doi.org/10.1140/epja/s10050-020-00071-6

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title = "Evidence for Octupole Collectivity in 172Pt",

abstract = "Excited states in the extremely neutron-decient 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 Iπ = 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 negative-parity band. The lowest member of this negative-parity structure was rmly 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 octupole-vibrational state.",

author = "A. Ertoprak and B. Cederwall and C. Qi and {\"O}. Akta{\c s} and M. Doncel and B. Hadinia and R. Liotta and M. Sandzelius and C. Scholey and K. Andgren and T. Back and H. Badran and T. Braunroth and T. Calverley and D.M. Cox and D.M. Cullen and Y.D. Fang and E. Ganioğlu and M. Giles and {Gomez Hornillos}, M.B. and T. Grahn and P.T. Greenlees and J. Hilton and D. Hodge and E. Ideguchi and U. Jakobsson and A. Johnson and P.M. Jones and R. Julin and S. Juutinen and S. Ketelhut and A. Khaplanov and {Kumar Raju}, M. and M. Leino and H. Li and H. Liu and S. Matta and V. Modiamo and {Nara Singh}, B.S. and M. Niikura and M. Nyman and I. Ozgur and R.D. Page and J. Pakarinen and P. Papadakis and J. Partanen and E.S. Paul and C.M. Petrache and P. Peura and P. Rahkila and P. Ruotsalainen and J. Sar{\'e}n and J. Sorri and S. Stolze and P. Subramaniam and M.J. Taylor and J. Uusitalo and J.J. Valiente-Dob{\'o}n and R. Wyss",

year = "2020",

month = feb,

day = "20",

doi = "10.1140/epja/s10050-020-00071-6",

language = "English",

volume = "56",

journal = "The European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

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Ertoprak, A, Cederwall, B, Qi, C, Aktaş, Ö, Doncel, M, Hadinia, B, Liotta, R, Sandzelius, M, Scholey, C, Andgren, K, Back, T, Badran, H, Braunroth, T, Calverley, T, Cox, DM, Cullen, DM, Fang, YD, Ganioğlu, E, Giles, M, Gomez Hornillos, MB, Grahn, T, Greenlees, PT, Hilton, J, Hodge, D, Ideguchi, E, Jakobsson, U, Johnson, A, Jones, PM, Julin, R, Juutinen, S, Ketelhut, S, Khaplanov, A, Kumar Raju, M, Leino, M, Li, H, Liu, H, Matta, S, Modiamo, V, Nara Singh, BS, Niikura, M, Nyman, M, Ozgur, I, Page, RD, Pakarinen, J, Papadakis, P, Partanen, J, Paul, ES, Petrache, CM, Peura, P, Rahkila, P, Ruotsalainen, P, Sarén, J, Sorri, J, Stolze, S, Subramaniam, P, Taylor, MJ, Uusitalo, J, Valiente-Dobón, JJ & Wyss, R 2020, 'Evidence for Octupole Collectivity in ¹⁷²Pt', The European Physical Journal A, vol. 56, 65. https://doi.org/10.1140/epja/s10050-020-00071-6

TY - JOUR

T1 - Evidence for Octupole Collectivity in 172Pt

AU - Ertoprak, A.

AU - Cederwall, B.

AU - Qi, C.

AU - Aktaş, Ö.

AU - Doncel, M.

AU - Hadinia, B.

AU - Liotta, R.

AU - Sandzelius, M.

AU - Scholey, C.

AU - Andgren, K.

AU - Back, T.

AU - Badran, H.

AU - Braunroth, T.

AU - Calverley, T.

AU - Cox, D.M.

AU - Cullen, D.M.

AU - Fang, Y.D.

AU - Ganioğlu, E.

AU - Giles, M.

AU - Gomez Hornillos, M.B.

AU - Grahn, T.

AU - Greenlees, P.T.

AU - Hilton, J.

AU - Hodge, D.

AU - Ideguchi, E.

AU - Jakobsson, U.

AU - Johnson, A.

AU - Jones, P.M.

AU - Julin, R.

AU - Juutinen, S.

AU - Ketelhut, S.

AU - Khaplanov, A.

AU - Kumar Raju, M.

AU - Leino, M.

AU - Li, H.

AU - Liu, H.

AU - Matta, S.

AU - Modiamo, V.

AU - Nara Singh, B.S.

AU - Niikura, M.

AU - Nyman, M.

AU - Ozgur, I.

AU - Page, R.D.

AU - Pakarinen, J.

AU - Papadakis, P.

AU - Partanen, J.

AU - Paul, E.S.

AU - Petrache, C.M.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sarén, J.

AU - Sorri, J.

AU - Stolze, S.

AU - Subramaniam, P.

AU - Taylor, M.J.

AU - Uusitalo, J.

AU - Valiente-Dobón, J.J.

AU - Wyss, R.

PY - 2020/2/20

Y1 - 2020/2/20

N2 - Excited states in the extremely neutron-decient 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 Iπ = 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 negative-parity band. The lowest member of this negative-parity structure was rmly 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 octupole-vibrational state.

AB - Excited states in the extremely neutron-decient 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 Iπ = 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 negative-parity band. The lowest member of this negative-parity structure was rmly 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 octupole-vibrational state.

U2 - 10.1140/epja/s10050-020-00071-6

DO - 10.1140/epja/s10050-020-00071-6

M3 - Article

SN - 1434-6001

VL - 56

JO - The European Physical Journal A

JF - The European Physical Journal A

M1 - 65

ER -

Evidence for Octupole Collectivity in 172Pt

Abstract

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Evidence for Octupole Collectivity in ¹⁷²Pt