title: Implications of deformation and shape coexistence for the nuclear shell model.
abstract: The successes of the nuclear shell model in explaining the stability properties of magic nuclei are challenged by the observation of rotational bands for which the sequential filling of single-particle energy levels of the spherical shell model are not respected. This Letter proposes criteria for identifying the shell-model configurations appropriate for describing such bands of states.
authors.affiliation: Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada.
authors.forename: D J
authors.initials: DJ
authors.lastname: Rowe
authors.forename: G
authors.initials: G
authors.lastname: Thiamova
authors.forename: J L
authors.initials: JL
authors.lastname: Wood