Beyond mean-field description of the low-lying spectrum of 16O

Abstract

Starting from constrained Skyrme-mean-field calculations, the low-energy excitation spectrum of 16O is calculated by configuration mixing of particle-number and angular-momentum projected mean-field states in the framework of the Generator Coordinate Method. Without any adjustable parameters, this approach gives a very good description of those states and their transition moments that can be described with our restriction to axially and reflection-symmetric shapes. The structure of low-lying 0+ states is analyzed in terms of self-consistent 0p-0h, 2p-2h, and 4p-4h Hartree-Fock states.

arXiv comment15 pages LATEX, 6 figures, 3 tables, revision of sections 4 and 5

References in corpus (7)

• Properties of ${}^{12}$C in the {\it ab initio} nuclear shell-model
• Shell Structure of the Superheavy Elements
• 3D Solution of Hartree-Fock-Bogoliubov Equations for Drip-Line Nuclei
• Configuration mixing of mean-field wave-functions projected on angular momentum and particle number; application to 24Mg
• Ground State Correlations in 16O and 40Ca
• GCM Analysis of the collective properties of lead isotopes with exact projection on particle numbers
• Approximate Particle Number Projection for Rotating Nuclei

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