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Isolated mixed-symmetry 2+ state of the radioactive neutron-rich nuclide Te132

T. Stetz1,*, H. Mayr1, V. Werner1,†, N. Pietralla1, Y. Tsunoda2, T. Otsuka2, G. Rainovski3, T. Beck1, R. Borcea4 et al.

S. Calinescu4, C. Costache4, I. E. Dinescu4, N. M. Florea4, K. Gladnishki3, K. E. Ide1, A. N. Ionescu4, D. Kocheva3, P. Koseoglou1, R. Lica4, N. Mărginean4, R. Mărginean4, C. Mihai4, R. E. Mihai4,5, A. Mitu4, C. M. Nickel1, C. R. Nita4, S. Pascu4, L. Stan4, S. Toma4, A. Turturică4, and R. Zidarova1

  • *Contact author: tstetz@ikp.tu-darmstadt.de
  • †Contact author: vw@ikp.tu-darmstadt.de
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Phys. Rev. C 112, 034325 – Published 23 September, 2025

DOI: https://doi.org/10.1103/l6dj-yfz7

Abstract

The M1 transition strengths between excited 2+ states of the neutron-rich, radioactive nuclide Te132 was studied through direct lifetime measurements using the Doppler-shift attenuation method in a two-neutron transfer reaction on a Te130 target. An unambiguous identification of the lowest-lying mixed-symmetry 2+ state was achieved on the basis of the large B(M1;22+→21+)=0.18(2)μN2 transition strength. Results are compared to the shell model, and the analysis of both data and calculations unambiguously identifies the second-excited 2+ state of Te132 as the one-quadrupole phonon mixed-symmetry state of this isotope. A lowering of the energy and B(M1;2ms+→21+) strength within the N=80 isotones toward the Z=50 shell closure is observed, which occurs along with the lowering of the E2 collectivity approaching the magic proton shell.

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Physics Subject Headings (PhySH)

Corrections

13 November, 2025

Correction: Authors N. M. Florea, R. Mărginean, A. Mitu, S. Pascu, and A. Turturică were missing at publication and have been added to the author list.

Article Text

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Outline

Information

Phys. Rev. C 112, 034325– Published 23 September, 2025
  • Received 1 November 2024
  • Revised 6 June 2025
  • Accepted 1 August 2025
  • Corrected 13 November 2025
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