# Atomic transition involving two electrons

In the Helium-like Iron ion, Fe XXV, there is a transition from $1s2p$ to $2s^2$, and the energy of the two levels are measured as 6667.5686 eV and 13546.26 eV. It seems like this transition involves jumps of two electrons, so will we simply observe a single emission/absorption line for this transition or two lines for each electron transition?

In terms of angular momentum, $1s2p$ has $l_1 = 0, l_2 = 1$, and $2s^2$ has $l_1 = 0, l_2 = 0$, so it looks consistent with a transition involving a single photon.