Radiative rates for E1, E2, M1, and M2 transitions in the Br-like ions Sr IV, Y V, Zr VI, Nb VII, and Mo VIII

<p>Energies and lifetimes are reported for the lowest 375 levels of five Br-like ions, namely SrIV, YV, ZrVI, NbVII, and MoVIII, mostly belonging to the 4s&lt;sup&gt;2&lt;/sup&gt;4p&lt;sup&gt;5&lt;/sup&gt;, 4s&lt;sup&gt;2&lt;/sup&gt;4p&lt;sup&gt;4&lt;/sup&gt;4â„“, 4s4p&lt;sup&gt;6&lt;/sup&gt;, 4s&lt;sup&gt;2&lt;/sup&gt;4p&lt;sup&gt;4&lt;/sup&gt;5â„“, 4s&lt;sup&gt;2&lt;/sup&gt;4p&lt;sup&gt;3&lt;/sup&gt;4d&lt;sup&gt;2&lt;/sup&gt;, 4s4p&lt;sup&gt;5&lt;/sup&gt;4â„“, and 4s4p&lt;sup&gt;5&lt;/sup&gt;5â„“ configurations. Extensive configuration interaction has been included and the general-purpose relativistic atomic structure package (grasp) has been adopted for the calculations. Additionally, radiative rates are listed among these levels for all E1, E2, M1, and M2 transitions. From a comparison with the measurements, the majority of our energy levels are assessed to be accurate to better than 2%, although discrepancies between theory and experiment for a few are up to 6%. An accuracy assessment of the calculated radiative rates (and lifetimes) is more difficult, because no prior results exist for these ions.</p>