Table 1
Parameters used in Eq. (1) to obtain the surface coverage for a given species.
Molecule | σ+(m/z)(a) | FF(m/z) | IF(z) | m/z | S(m/z)(b) |
---|---|---|---|---|---|
CO | 1.296(c) | 1 | 1 | 28 | 1 |
Ar | 1.840(d) | 1 | 1 | 40 | 0.98 |
CO2 | 1.698(c) | 0.95 | 1 | 44 | 0.80 |
NH3 | 1.909(e) | 0.55 | 1 | 18 | 1.16 |
CH3OH | 3.446(f) | 0.72 | 1 | 32 | 0.95 |
H2O | 1.262(c) | 0.90 | 1 | 18 | 1.16 |
NH4+HCOO− | 2.150(g) | 0.55 | 1 | 64 | 0.54 |
Notes. (a)Ionisation cross section from electron impact of 30 eV, units of 10−16 cm−2. (b)Sensitivity of the QMS obtained from Hiden (2023). (c)Orient & Strivastava (1987). (d)Straub (1995). (e)Itikawa (2017). (f)Nixon et al. (2016). (g) As there are no value for ammonium formate in the literature, we assumed the one from formic acid reported from Zawadzki (2018).
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.