Fig. 1: Illustration of the pump-probe scheme.
From: Ultrafast relaxation of photoexcited superfluid He nanodroplets
a The filled area represents the absorption spectrum of He nanodroplets taken from Joppien et al.18. He atomic levels are shown on the right-hand side. b Potential curves of the singlet-excited He\({}_{2}^{* }\) dimer correlating to the \(1s2s\) \({}^{1}S\) and \(1s2p\) \({}^{1}P\) atomic states were computed as detailed in the Methods section. The vertical straight arrows indicate the pump and probe laser pulses, the dotted curved arrows indicate the droplet relaxation pathway. The double-sided arrow in (a) illustrates the electron kinetic energy \({T}_{{\rm{e}}}\).
