title: Partially solvable pair-coupling models with seniority-conserving interactions.
abstract: Given a single j-shell Hamiltonian, the algebraic conditions for conservation of seniority are derived from a quasispin tensor decomposition of the two-nucleon interaction. This makes it possible to construct useful solvable and partially solvable shell-model Hamiltonians with eigenstates classified by a spectrum generating algebra. Applications are made to the low-lying energy levels of the N = 50 nuclear isotones.
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: Rosensteel