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Table 3
X-ray astrophysical photodesorption yields in molecules desorbed per incident photon (molecules photon−1) of CH3 CN, HCN, CH4, and CH3 from CO-dominated and H2O-dominated ices at 15 K.
| CH3CN | HCN | CH4 | CH3 | |
|---|---|---|---|---|
| Mixed with CO | ||||
| Source spectrum | 2.0±1.0 × 10−4 | 3.9±2.0 × 10−4 | < 1.0±0.5 × 10−4 | 1.8±0.9 × 10−4 |
| NH = 1021 cm−2 | 1.8±0.9 × 10−4 | 3.6±2.8 × 10−4 | <9.4±4.7 × 10−5 | 1.7±0.8 × 10−4 |
| NH = 1022 cm−2 | 9.1±4.5 × 10−5 | 1.8±0.9 × 10−4 | <4.3±2.1 × 10−5 | 8.2±4.1 × 10−5 |
| NH = 1023 cm−2 | 1.2±0.6 × 10−5 | 2.3±1.2 × 10−5 | <5.6±2.8 × 10−6 | 1.1±0.6 × 10−5 |
| NH = 1024 cm−2 | 1.6±0.8 × 10−6 | 3.1±1.5 × 10−6 | <7.5±3.7 × 10−7 | 1.4±0.7 × 10−6 |
| Mixed with H2O | ||||
| Source Spectrum | < 5.6±2.8 × 10−5 | 1.5±0.7 × 10−4 | 3.2±1.6 × 10−4 | < 1.1±0.6 × 10−4 |
| NH = 1021 cm−2 | <5.1±2.5 × 10−5 | 1.4±0.7 × 10−4 | 3.0±1.5 × 10−4 | <1.0±0.5 × 10−4 |
| NH = 1022 cm−2 | <2.4±1.2 × 10−5 | 7.2±3.6 × 10−5 | 1.6±0.8 × 10−4 | <4.7±2.3 × 10−5 |
| NH = 1023 cm−2 | <3.2±1.6 × 10−6 | 9.8±4.9 × 10−6 | 2.2±1.1 × 10−5 | <6.4±3.2 × 10−6 |
| NH = 1024 cm−2 | <4.3±2.6 × 10−7 | 1.3±0.6 × 10−6 | 2.9±1.4 × 10−6 | <8.6±4.3 × 10−7 |
Notes. These yields were derived according to the method described in Sect. 2.
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