title: Particle Size Fractionation of Airborne Gamma-Emitting Radionuclides by Graded Filters.
abstract: Three filters in series were employed to separate into groups, according to size, the nuclear debris suspended in air at ground level. The concentrations of airborne Ce(144)-Pr(144), Sb(125), Cs(137), Zr(95)-Nb(95), Mn(54), and Ru(106)-Rh(106) in each size group were determined by gamma spectral analysis. Particles having diameters of less than 1.75 microns contained a minimum of 88 percent of the total activity.
authors.forename: B
authors.initials: B
authors.lastname: Shleien
authors.forename: T P
authors.initials: TP
authors.lastname: Glavin
authors.forename: A G
authors.initials: AG
authors.lastname: Friend