Question: Calculate the average rate at which He atoms strike an iron atom in a surface formed by exposing a (l00) plane in metallic iron to

Calculate the average rate at which He atoms strike an iron atom in a surface formed by exposing a (l00) plane in metallic iron to helium gas at 100 K and a pressure of24 Pa. Crystals of iron are body-centred cubic with a cell edge of 145 pm.

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