Faculté des sciences

Spectroscopy of Rb₂ dimers in solid ⁴He

Moroshkin, Peter ; Hofer, Adrian ; Ulzega, Simone ; Weis, Antoine

In: Physical Review A, 2006, vol. 74, p. 032504

We present experimental and theoretical studies of the absorption, emission, and photodissociation spectra of Rb₂ molecules in solid helium. We have identified 11 absorption bands of Rb₂. All laser-excited molecular states are quenched by the interaction with the He matrix. The quenching results in efficient population of a metastable (1) ³πu state, which emits... More

Add to personal list
    Summary
    We present experimental and theoretical studies of the absorption, emission, and photodissociation spectra of Rb₂ molecules in solid helium. We have identified 11 absorption bands of Rb₂. All laser-excited molecular states are quenched by the interaction with the He matrix. The quenching results in efficient population of a metastable (1) ³πu 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 Rb₂(³πu)He₂. We have also found evidence for the formation of diatomic bubble states following photodissociation of Rb₂.