Negative ion resonances in the autoionizing region of zinc:: excitation of the 4s4p 3P0,1,2 states

Temporary negative ion resonances above the ionization threshold of zinc atoms have been observed in angular differential electron excitation functions and photon excitation functions of the lowest optically forbidden P-3 state. These resonances involve the opening of the 3d-shell or double excitation from the outermost 4s-shell and provide a sensitive test for channel coupling and electron correlation effects.