From the previous post "Electrons In Orbit Again",
re=me±√m2e−Aπv2(q2εo−TeTnτo)2A
re turns complex when v2 is low such that the discriminant is negative. It would seems that a phase lag develops between the pull of the nucleus (and other forces) and the response of the electron as seen by a changing re.
The electron is not fully captured by the nucleus, this electron will accelerate towards the nucleus and gain greater speed before entering into orbit around the nucleus.