Fig. 2.
Temperature dependence of the total rate constant k for the reaction of He+ with DME. Solid black line: recommended values from KIDA database according to Eq. (1); dashed red line: recommended values from UDfA according to Eq. (1); dotted green line: Langevin rate constant kL according to Eq. (4); dashed pink line: classical trajectory scaling according to Eq. (3) (Su & Chesnavich 1982); solid blue line: our calculations; cyan dotted-dashed line: our calculations, upper limit estimate; cyan dashed line: our calculations, lower limit estimate (see text).
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