title: Collective and Single-Particle Motion in Beyond Mean Field Approaches.
abstract: We present a novel nuclear energy density functional method to calculate spectroscopic properties of atomic nuclei. Intrinsic nuclear quadrupole deformations and rotational frequencies are considered simultaneously as the degrees of freedom within a symmetry conserving configuration mixing framework. The present method allows the study of nuclear states with collective and single-particle character. We calculate the fascinating structure of the semimagic ^{44}S nucleus as a first application of the method, obtaining an excellent quantitative agreement both with the available experimental data and with state-of-the-art shell model calculations.
authors.affiliation: Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
authors.forename: J Luis
authors.initials: JL
authors.lastname: Egido
authors.affiliation: Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: Borrajo
authors.affiliation: Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
authors.forename: Tomás R
authors.initials: TR
authors.lastname: Rodríguez