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Fig. 1


Calculated volumetric O(1S) production rate profiles for major production mechanisms in comet C/2006 W3 (Christensen) with H2O production rate of 2 × 1028 s-1 and 42% CO2 and 98% CO abundances relative to H2O in the cometary coma when the comet was at 3.13 au heliocentric distance. hν: solar photon; eph: photoelectron; and eth: thermal electron.

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