Before revision: 3), where z = 2 for 1D diffusion as would be the case for in-channel diffusion, z = 4 for 2D diffusion, and z = 6 for 3D diffusion.Structure and Dynamics of Surfaces II (Topics in Current Physics), W. Schommers, P. Von Blanckenhagen, ISBN-10: 0387173382.
After revision: 3), where z = 2 for 1D diffusion as would be the case for in-channel diffusion, z = 4 for 2D diffusion, and z = 6 for 3D diffusion.Structure and Dynamics of Surfaces II (Topics in Current Physics), W. Schommers, P. Von Blanckenhagen, ISBN 0387173382.