Structured emission of relaxing systems: molecular excitons in rare-gas crystals |
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Authors: | R. Englman A. Ranfagni D. Mugnai |
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Affiliation: | Soreq Nuclear Research Centre, Yavne, Israel;Istituto di Ricerca sulle Onde Elettromagnetiche del CNR, Firenze, Italy |
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Abstract: | We have computed the emission spectra of relaxing excitated-state systems in solids as a function of the rates of radiative decay (γ) from excited to ground state and non-radiative decay (γ) within the excited state. When these are comparable a pronounced dip is obtained in the central region of the spectrum, which then may have the appearance of two distinct, unrelated emission bands. The computations well reproduce the observed W and M2 bands in Ar crystals. Accordingly, these arise from the initially excited and near repulsive regions of the A1Σ+ emitting state, respectively. |
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