title: Fibrous Filters as Particle-Size Analyzers.
abstract: 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.
authors.forename: M D
authors.initials: MD
authors.lastname: Silverman
authors.forename: W E
authors.initials: WE
authors.lastname: Browning