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Amorphous solid water (ASW) is of great importance in astrochemistry as it has been detected in star forming regions, comets, and cold solar-system objects. A key property of ASW is its porous nature (with the extent of porosity reflecting the formation and growth conditions) and the subsequent pore collapse when the ice is heated. If interstellar ices are porous there are huge implications to both the process of planet formation and the budgets of molecular gas in the solid and gas phases. It is therefore vital to understand ASW porosity over astronomically relevant conditions in order to effectively model its potential effects on these processes.
We present preliminary reflection extended X-ray absorption fine structure results on reactive magnetron sputtering molybdenum nitride (MoN) layered samples, with different compositions and surface layer thickness. The results obtained over a wide range of incidence angles show significant differences between two samples where the outer layer is either Mo metal or MoN.
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