Quadrupole collectivity in silicon isotopes approaching neutron number N = 28

C. M. Campbell, N. Aoi, D. Bazin, M. D. Bowen, B. A. Brown, J. M. Cook, D. C. Dinca, A. Gade, T. Glasmacher, M. Horoi, S. Kanno, T. Motobayashi, L. A. Riley, H. Sagawa, H. Sakurai, K. Starosta, H. Suzuki, S. Takeuchi, J. R. Terry, K. YonedaH. Zwahlen

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Abstract

Quadrupole deformation parameters, | β2, (p, p′) |, have been deduced for 36,38,40Si from measured inelastic proton-scattering cross sections. Due to the strong Z = 14 subshell gap, low-lying quadrupole collectivity in these nuclei is attributed to the excitation of valence neutrons. Enhanced collectivity at N = 26 indicates a reduced N = 28 shell gap at large neutron excess in this chain of isotopes. Data are compared to large-scale shell-model calculations and prior Coulomb excitation measurements on 36,38Si.

Original languageEnglish
Pages (from-to)169-173
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume652
Issue number4
DOIs
StatePublished - Aug 30 2007

Keywords

  • Inelastic proton scattering
  • Quadrupole collectivity
  • Si
  • Si
  • Si

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