A1 Journal article (refereed)
Lifetime measurement of the yrast 2+ state in 118Te (2023)

Ahlgren Cederlöf, E., Bäck, T., Nyberg, J., Qi, C., Ataç, A., Badran, H., Braunroth, T., Calverley, T., Cox, D. M., Doncel, M., Grahn, T., Greenlees, P., Hilton, J., Julin, R., Juutinen, S., Konki, J., Li, H., Matta, S., Modamio, V., . . . Valiente-Dobón, J.J. (2023). Lifetime measurement of the yrast 2+ state in 118Te. European Physical Journal A, 59, Article 300. https://doi.org/10.1140/epja/s10050-023-01212-3

JYU authors or editors

Publication details

All authors or editors: Ahlgren Cederlöf, E.; Bäck, T.; Nyberg, J.; Qi, C.; Ataç, A.; Badran, H.; Braunroth, T.; Calverley, T.; Cox, D. M.; Doncel, M.; et al.

Journal or series: European Physical Journal A

ISSN: 1434-6001

eISSN: 1434-601X

Publication year: 2023

Publication date: 20/12/2023

Volume: 59

Article number: 300

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1140/epja/s10050-023-01212-3

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/93027

Abstract

The electromagnetic transition probabilities of the yrast 2+ states in the midshell Te isotopes, two protons above the closed shell at Sn, are of great importance for the understanding of nuclear collectivity in these isotopes and the role played by the neutron-proton interactions and crossshell excitations. However, the large uncertainty of the experimental data for the midshell nucleus 118Te and the missing data for 116Te make it difficult to pin down the general trend of the evolution of transition probabilities as a function of the neutron number. In this work, the lifetime of the yrast 2+ state in 118Te was measured, with the aim of reducing the uncertainty of the previous measurement. The result is τ2+ = 7.46(19) ps. In addition, the lifetime of the 4+ state was measured to be τ4+ = 4.25(23) ps. The experimental transition rates are extracted from the measured lifetimes and compared with systematic large-scale shell-model calculations. The trend of the B(E2; 0+ → 2+) values in the midshell area is in good agreement with the calculations and the calculated B4/2 ratio provide evidence for 118Te as a near perfect harmonic vibrator.

Keywords: nuclear physics; tellurium

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Ministry reporting: Yes

VIRTA submission year: 2023

JUFO rating: 2