Fibrous Filters as Particle-Size Analyzers.
A method was developed for characterizing radioactive aerosols by determining their distribution as a function of depth in fibrous filters under carefully controlled conditions. The method distinguishes the contributions of three major processes of filtration: diffusion, interception, and inertial impaction. For those experiments where diffusion is the controlling mechanism, particle sizes in the range of 50 to 500 A thus determined compare favorably with those obtained from concentration and flow data and electron photomicrographs.
Silverman
M D
MD
Browning
W E
WE