[en] We report a measurement of the branching ratio for production of 5d_3/2 ions in various m_j states following the autoionization of the (6_p1/2nd_5/2)J=M_J=3 states of barium in an electric field. By detecting the population in different ion states, rather than the electron distribution, we are able to measure the decay routes even in the presence of an electric field. These branching ratios show pronounced new structure, even at fields as low as 30 V/cm

[en] We report a measurement of the energy dependence of the branching ratios for autoionization of the (6p_1/2nd_5/2)J=M_J=3 states of barium into the 5d_3/2ε ell continuum channels by monitoring the population in each m_j state of the 5d_3/2 residual ion. We use polarization sensitive laser-induced-fluorescence to detect the ion populations. Near the energy of the 6p_1/2ng J = 3 resonances, the doubly-excited barium atom produces nearly 40% of its population in the 5d_3/2εh_9/2 channel, corresponding to an exchange of at least 3 units of orbital angular momentum

[en] We report a measurement of the energy dependence of the branching ratios for autoionization of the (6p_1/2nd5/2)_J=MJ=3 states of barium into the 5d_3/2εl continuum channels by monitoring the population in each m_j state of the 5d_3/2 residual ion. We use polarization-sensitive laser-induced fluorescence to detect the ion populations. Near the energy of the (6p_1/2ng7/2)_J=3 perturbing resonances, nearly 25% of the doubly excited barium atoms produce the 5d_3/2εh_9/2 channel, requiring an exchange of at least three units of orbital angular momentum between the excited electrons