Study of the isospin character of 1^-states using hadronic probes at intermediate energies

Abstract

Abstract. The complementary (γ, γ ) and (α, α γ) reactions were used to study the isospin properties of lowlying E1 excitations in the doubly-magic nucleus 48 Ca. In contrast to heavier nuclei, a state-to-state change in isospin character was revealed in 48 Ca and a dominant isoscalar excitation was found which is interpreted as an isoscalar oscillation. Recently, protons at 80 MeV were used as an additional hadronic probe in a p-γ coincidence experiment on 140 Ce for the first time. Results of the experiments on 48 Ca and first results of the 140 Ce will be presented in this contribution.