Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He

Details Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He

2006-06-12

arxiv.org/abs/physics/0606100v1

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.74.032504

We present experimental and theoretical studies of the absorption, emission and photodissociation spectra of Rb$_{2}$ molecules in solid helium. We have identified 11 absorption bands of Rb$_{2}$. All laser-excited molecular states are quenched by the interaction with the He matrix. The quenching results in efficient population of a metastable (1)$^{3}\Pi_{u}$ state, which emits fluorescence at 1042 nm. In order to explain the fluorescence at the forbidden transition and its time dependence we propose a new molecular exciplex Rb$_{2}(^{3}\Pi_{u})$He$_{2}$. We have also found evidence for the formation of diatomic bubble states following photodissociation of Rb$_{2}$.

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