Determination of Diffusion Hardening in Water

Diffusion lengths have been measured in H₂O as a function of boric acid concentration. From these measurements of diffusion lengths, the diffusion parameters of water were determined by an improved method of analysis. The diffusion parameters for water reported are: the microscopic absorption cross section σ_a = 326.9 ± 1.6mb, the diffusion coefficient = 35,850 ± 100 cm²/sec and the diffusion hardening coefficient H = 2900 ± 350 cm⁴/sec.