TABLE 3.

Results of the line-scanning experiment

Line No.	G(0)	D	χ2	A	k (s−1)	χ2	χ2 ratio
101	0.0070	0.90	1.3	0.0057	13.7	0.9	1.4
127	0.0078	0.63	1.6	0.0065	11.6	1.1	1.4
143	0.0083	1.09	1.6	0.0061	16.3	1.4	1.2
151 (×2)	0.0108	0.82	2.4	0.0086	13.9	1.7	1.4
160 (×2)	0.0091	0.67	2.1	0.0073	11.6	1.5	1.4
Average	0.0086	0.82	1.8	0.0068	13.4	1.3	1.4

At lines 151 and 160, two adjacent lines were averaged. Fits were performed using either a diffusion term characterized by G(0) and D (in μm2/s) or an exponential term characterized by amplitude A and rate k (in s⁻¹). Each fit provides a χ² value. The ratio of the χ² values for the fit using the diffusion equation and the rate equation are reported in the last column.