Desorption dynamics of RbHe exciplexes off He nanodroplets induced by spin-relaxation

作者：Coppens Francois; von Vangerow Johannes; Barranco Manuel; Halberstadt Nadine; Stienkemeier Frank; Pi Marti; Mudrich Marcel^*

来源：Physical Chemistry Chemical Physics, 2018, 20(14): 9309-9320.

DOI：10.1039/c8cp00482j

Doped He nanodroplets are ideal model systems to study the dynamics of elementary photophysical processes in heterogeneous nanosystems. Here we present a combined experimental and theoretical investigation of the formation of free RbHe exciplex molecules from laser-excited Rb-doped He nanodroplets. Upon excitation of a droplet-bound Rb atom to the 5p(3/2)(3/2)(2)-state, a stable RbHe exciplex forms within about 20 ps. Only due to (2)(3/2) (2)(1/2) spin-relaxation does the RbHe exciplex detach from the He droplet surface with a half life of about 700 ps, given by the spin-relaxation time and the coupling of spin and translational degrees of freedom.

• 出版日期2018-4-14