Resonance parameters of autoionizing Be 2pnl states

We have employed monochromatized synchrotron radiation to measure the Be+ ion yield in the photon energy region of the Be 2pnl(n=3-12) double excitations. The energy positions of the resonances are in good agreement with a previous experiment [J. M. Esteva, G. Mehlman-Balloffet, and J. Romand, J. Quant. Spectrosc. Radiat. Transf. 12, 1291 (1972)] and theoretical calculations. We also report the experimentally determined Fano parameters of the widths Gamma and profile parameters q for the 2pns (nless than or equal to8) resonances. The q values are about -0.54 except for n=3 with a clearly lower value of -0.93(5).