Moroshkin, Peter Hofer, Adrian Ulzega, Simone Weis, Antoine 2006-09-07 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) ³π_<i>u</i> 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(³π_<i>u</i>)He₂. We have also found evidence for the formation of diatomic bubble states following photodissociation of Rb₂. application/pdf https://folia.unifr.ch/global/documents/300129 https://folia.unifr.ch/documents/300129/files/weis_srd.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.74.032504 info:eu-repo/semantics/openAccess License undefined Physical Review A. - 2006, vol. 74, p. 032504 info:eu-repo/classification/udc/53 Spectroscopy of Rb₂ dimers in solid ⁴He http://purl.org/coar/resource_type/c_6501