An alternative viewpoint on the nuclear structure towards 100Sn : Lifetime measurements in 105Sn
Pasqualato, G., Gottardo, A., Mengoni, D., Goasduff, A., Valiente-Dobón, J.J., Nowacki, F., Péru, S., Pillet, N., de Angelis, G., Bakes, S. D., Bayram, T., Bazzacco, D., Benzoni, G., Brugnara, D., Cicerchia, M., Colovic, P., Cortés, M. L., Gadea, A., Galtarossa, F., . . . Zanon, I. (2023). An alternative viewpoint on the nuclear structure towards 100Sn : Lifetime measurements in 105Sn. Physics Letters B, 845, Article 138148. https://doi.org/10.1016/j.physletb.2023.138148
Published inPhysics Letters B
Péru, S. |
© 2023 The Authors. Published by Elsevier B.V.
This work aims at presenting an alternative approach to the long standing problem of the B(E2) values in Sn isotopes in the vicinity of the N=Z double-magic nucleus 100Sn, until now predominantly measured with relativistic and intermediate-energy Coulomb excitation reactions. The direct measurement of the lifetime of low-lying excited states in odd-even Sn isotopes provides a new and precise guidance for the theoretical description of the nuclear structure in this region. Lifetime measurements have been performed in 105Sn for the first time with the coincidence Recoil Distance Doppler Shift technique. The lifetime results for the 7/2+ 1 first excited state and the 11/2+ 1 state, 2+(104Sn) ⊗ ν1g7/2 multiplet member, are discussed in comparison with state-of-the-art shell model and mean field calculations, highlighting the crucial contribution of proton excitation across the core of 100Sn. The reduced transition probability B(E2) of the 11/2+ 1 core-coupled state points out an enhanced staggering with respect to the B(E2; 2+ 1 →0+ 1 ) in the even-mass 104Sn and 106Sn isotopes. ...
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Additional information about fundingThe work of the author G.P. of this paper has been partly funded by the P2IO LabEx (ANR-10-LABX-0038) in the framework “Investissements d'Avenir” (ANR-11-IDEX-0003-01) managed by the French National Research Agency (ANR). M.S. acknowledge the support of the OASIS project no. ANR-17-CE31-0026 and the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. The work of A.G. was supported by MCIN/AEI/10.13039/501100011033 and Generalitat Valenciana, Spain under grants FPA2017-84756-C4, PID2020-118265GB-C4, PROMETEO 2019/005 and by the EU FEDER funds. Support for S.S. and P.C. were provided by the Croatian Science Foundation under the project IP-2018-01-1257, and by Scientific Center of Excellence for Advance Materials and Sensors in Zagreb. ...
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