Sizing of the Fall-Out at Vienna

Abstract

DURING December 22, 1961–January 8, 1962, the occurring aerosol at Vienna was sampled for 403.5 hr. continuously on filter paper F (Schleicher und Schüll chromatographierpapier 2043 Mg1) by a Goetz aerosol spectrometer AS¹ at the site of the First Physics Institute of the University (window on the second floor). The spectrometer effects the quantitative separation and size selective deposition of the airborne particulate matter. The deposit pattern yields the size distribution. The operating conditions of the spectrometer for this run were 10,000 r.p.m. and 40 mil limiting orifices, that is, the spectrometer did sample all the airborne particles with Stokes's diameters δ between 0.3µ and 5µ at a rate of 3.0 l./min. (total volume of the sample 72.6 m.³).