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Fig. 7
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Evolution of the D2CS/H2CS ratio (colour bar) as a function of time and temperature for a CR ionisation rate ξ =1.3 × 10−17 s−1, a hydrogen number density nH = 105, 106, and 107 cm−3, and an initial sulphur abundance S+ = 1.5 × 10−5, 1.5 × 10−6, and 1.5 × 10−7.
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