Evolution of single-particle structure of silicon isotopes

• Published in: The European physical journal. A, Hadrons and nuclei Vol. 54; no. 1; pp. 1 - 14
• Main Authors: Bespalova, O. V., Fedorov, N. A., Klimochkina, A. A., Markova, M. L., Spasskaya, T. I., Tretyakova, T. Yu
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2018; Springer Nature B.V
• Subjects: Evolution; Hadrons; Heavy Ions; Isotopes; Nuclear Fusion; Nuclear Physics; Nuclei (nuclear physics); Particle and Nuclear Physics; Physics; Physics and Astronomy; Proton density (concentration); Regular Article - Theoretical Physics; Silicon isotopes
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/i2018-12449-x

. New data on proton and neutron single-particle energies E n l j of Si isotopes with neutron number N from 12 to 28 as well as occupation probabilities N n l j of single-particle states of stable isotopes 28, 30 Si 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.