In:
The European Physical Journal A, Springer Science and Business Media LLC, Vol. 56, No. 2 ( 2020-02)
Abstract:
Excited states in the extremely neutron-deficient nucleus $$^{172}{\mathrm {Pt}}$$ 172 Pt were populated via $$^{96}\mathrm {Ru}(^{78}\mathrm {Kr},2p)$$ 96 Ru ( 78 Kr , 2 p ) and $$^{92}\mathrm {Mo}(^{83}\mathrm {Kr},3n)$$ 92 Mo ( 83 Kr , 3 n ) reactions. The level scheme has been extended up to an excitation energy of $$\approx 5~\hbox {MeV}$$ ≈ 5 MeV and tentative spin-parity assignments up to $$I^\pi = 18^+$$ 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 firmly assigned spin-parity $$3^-$$ 3 - . In addition, we observed an E3 transition from this $$3^-$$ 3 - state to the ground state, providing direct evidence for octupole collectivity in $$^{172}{\mathrm {Pt}}$$ 172 Pt . Large-scale shell model (LSSM) and total Routhian surface (TRS) calculations have been performed, supporting the interpretation of the $$3^-$$ 3 - state as a collective octupole-vibrational state.
Type of Medium:
Online Resource
ISSN:
1434-6001
,
1434-601X
DOI:
10.1140/epja/s10050-020-00071-6
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2020
detail.hit.zdb_id:
1413603-X
detail.hit.zdb_id:
1459066-9
Bookmarklink