  Accurate calculations of phase lag associated with coherent control where an
excited system decays into more than one product channel have recently been
reported for atomic barium in PhysRevA.105.013113 (2022). The present study
extends the calculations to make predictions of that observable for another
alkaline earth atom, strontium, with a discussion of its spectrum and phase lag
for energies between the $Sr^{+}$ $4d_{3/2}$ and $4d_{5/2}$ thresholds. We will
explore the physics influenced by the electron correlations of strontium and
the long-range Coulomb potential. The behavior of the phase lag cannot be
simply addressed by a time delay analysis, although the latter is often used to
address the prominent channel of resonance decay of doubly excited states.

Atomic Physics