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Table 1

Desorption energies of noble gases.

Surface Neon Argon Krypton Xenon Reference
Tpeak (K) Edes (K) Tpeak (K) Edes (K) Tpeak (K) Edes (K) Tpeak (K) Edes (K)
H2O 22 671 54 1695 67 2117 80 2542 This work(a)
H2O:CO2 (10:1) 20 608 50 1565 59 1857 73 2313 This work(a)
H2O:CO2 (10:2) 18 545 45 1404 55 1727 67 2117 This work(a)

Dosed on ASW [30–40] 867 [41–51] 1371 [56–61] 1960 Smith et al. (2016)(b)
Pure 875 1180 1530 Schneiderman (2022)(c)
On H2O (compact) [13–18] 35 1165 44 1440 58 1995 Schneiderman (2022)(c)

Notes. (a)All desorption energies are determined using the Redhead equation and using an assumed pre-exponential frequency factor of 1012 s−1 in combination with a heating rate of 0.033 K s−1 (= 2 K min−1). (b)Range of peak desorption temperature for 0.1–3.0 ML coverage, see Fig. 5 of Smith et al. (2016). The listed desorption energy is the most probable out of a range of values. (c)Peak desorption temperatures and desorption energies of 1 ML coverage experiments, or as close as possible, are listed. The monolayer desorption energy is the most probable out of a range of values. The Ar, Kr, and Xe peak desorption temperatures are determined from the second peak in the TPD traces in Figs. 2–4 of Schneiderman (2022), which is associated with noble gases bound to water ice, while Ne release can occur from 10 to 20 K as shown in Figs. 3 and 2, but it is unclear what is pure phase or water-surface bound desorption.

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