Table 1
X-ray photodesorption yields (in 10−3 molecule/photon) at 564 eV from pure methanol ice at 15 K and for a dose between 5 × 1015 and 2 × 1016 photon cm−2.
| Mass – photodesorbed species | Yield | Mass – photodesorbed species | Yield |
|---|---|---|---|
| 15 – CH3 (1) | 1.3±0.2 | 30 – H2CO | 1.2±0.5 |
| 16 – CH4, O | 1.1±0.2 | 32 – CH3OH | 7.6±0.9 |
| 17 – OH | ND (*) | 44 – CO2 | 24±1 |
| 18 – H2O | 7.5±1.1 | 46 – HCOOH, C2H6O isomers | 0.8±0.3 |
| 28 – CO |  |
Notes. (*) ND = Not detected: the desorption signal measured for the considered species is lower than our signal-to-noise ratio, meaning that we did not detect its desorption from the ice. Considering the noise profile in the mass channel 17 of our QMS, if OH photodesorption occurs, the photodesorption yield is < 5 × 10−4 molecule/photon. (1) The yield is given without being able to correct for the cracking of CH4 into CH3 in the QMS.These values may therefore be overestimated.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.