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Evolution of single-particle structure of silicon isotopes

  • Regular Article - Theoretical Physics
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Abstract.

New data on proton and neutron single-particle energies \( E_{nlj}\) of Si isotopes with neutron number N from 12 to 28 as well as occupation probabilities \( N_{nlj}\) of single-particle states of stable isotopes 28, 30Si near the Fermi energy were obtained by the joint evaluation of the stripping and pick-up reaction data and excited state decay schemes of neighboring nuclei. The evaluated data indicate the following features of single-particle structure evolution: persistence of Z = 14 subshell closure with N increase, the new magicity of the number N = 16, and the conservation of the magic properties of the number N = 20 in Si isotopic chain. The features were described by the dispersive optical model. The calculation also predicts the weakening of N = 28 shell closure and demonstrates evolution of a bubble-like structure of the proton density distributions in neutron-rich Si isotopes.

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Authors and Affiliations

  1. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, GSP-1, Leninskie gory 1(2), 119991, Moscow, Russia

    O. V. Bespalova, A. A. Klimochkina, T. I. Spasskaya & T. Yu. Tretyakova

  2. Faculty of Physics, Lomonosov Moscow State University, GSP-1, Leninskie gory 1(2), 119991, Moscow, Russia

    N. A. Fedorov & M. L. Markova

Authors
  1. O. V. Bespalova
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  2. N. A. Fedorov
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  3. A. A. Klimochkina
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  4. M. L. Markova
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  5. T. I. Spasskaya
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  6. T. Yu. Tretyakova
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Correspondence to T. Yu. Tretyakova.

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Communicated by T. Duguet

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Bespalova, O.V., Fedorov, N.A., Klimochkina, A.A. et al. Evolution of single-particle structure of silicon isotopes. Eur. Phys. J. A 54, 2 (2018). https://doi.org/10.1140/epja/i2018-12449-x

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