Photochemistry of the PAH pyrene in water ice: the case for ion-mediated solid-state astrochemistry

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Table 2:

The reaction rates for the VUV photolysis of Py:H₂O ( $\sim$ 1:5000) ice at 25 K compared to those for 4-methylypyrene:H₂O (1:>500) ice at 15 K (Gudipati & Allamandola 2003).
$\begin{displaymath}\begin{tabular}{l c r@{~$\times$~}l c c} \hline \hline \noali... ... 1)&10$^{-4}$&... &5 $\times$ 10$^{-5}$\\ \hline \end{tabular}\end{displaymath}$ Notes. ^(a) Photon rates are indicated only for reaction channels which are dominated by photon processes.

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