Fig. 3

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Infrared spectra of a thin film of perylene irradiated with 48Ca+ ions recorded before irradiation (in blue) and after a fluence of 2.8 × 1012 ion cm−2 (in red). Insert: evolution of the integrated optical depth of the C=C IR band at ~1495 cm−1, normalised to the initial film prior to irradiation. The solid line is an exponential fit of the destruction cross-section (Eq. (6)) to the data, the dashed lines represent ±3σ with respect to the best fit.
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