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Table 3
Electron-impact cross sections of species considered in the fitting routine.
| Molecule | Chemical formula | σ70 eV | σ35 eV | Ref. | ||||
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|
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| Carbon monoxide | CO | 2.44 | 1.43 | a | ||||
| Methane | CH4 | 3.524 | 2.692 | b | ||||
| Carbon dioxide | CO2 | 3.15 | 1.41 | a | ||||
| Formaldehyde | H2CO | 4 | 3.2 | c | ||||
| Dimethyl ether | CH3OCH3 | 8 | 4.2 | d | ||||
| Methyl formate | HCOOCH3 | 6.9 | 4.6 | e | ||||
| Methanol | CH3OH | 4.44 | 2.98 | f | ||||
| Ethanol | CH3CH2OH | 7.31 | 4.94 | f | ||||
| Water | H2O | 2.275 | 1.515 | g | ||||
| Formic acid | HCOOH | 4.6 | 3.43 | c | ||||
| Acetic acid | CH3COOH | 7.73 | 5.09 | c | ||||
| Glycolaldehyde | HOCH2CHO | 7.3 | 5.11 | h | ||||
| Ethylene glycol | (CH2OH)2 | 6.17 | 4.15 | c | ||||
Reference. a: Hudson et al. (2004); b: Kim et al. (1997); c: Bhutadia et al. (2012); d: Sugohara et al. (2013); e: Hudson et al. (2006); f: Hudson et al. (2003); g: Kim & Rudd (1994); h: Bull & Harland (2008).
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