TY - JOUR
T1 - Diffusion charging of ultrafine aerosol particles by positive helium, argon, and nitrogen ions
AU - Adachi, Motoaki
AU - Okuyama, Kikuo
AU - Kousaka, Yasuo
AU - Kozuru, Hiroyuki
AU - Pui, David Y.H.
PY - 1987
Y1 - 1987
N2 - The unipolar charging phenomena of ultrafine aerosol particles less than 0.1 μm in diameter by positive gas molecule ions produced by α-ray irradiation are experimentally evaluated in helium, argon, nitrogen, and helium-argon mixture gases. The dependencies of the diffusion charging process of particles on ion species of positive helium, argon, and nitrogen ions are quantitatively well explained by a numerical solution of the population balance equations with the use of Fuchs' combination probability between particles and ions [N. A. Fuchs, Geofis. Pura Appl. 56, 185 (1963)]. The quantity of charge on particles decreases with an increase of ion mass in the order of the helium, nitrogen, and argon ions. The particle charging in a helium-argon mixture is determined by the ion concentration of both species.
AB - The unipolar charging phenomena of ultrafine aerosol particles less than 0.1 μm in diameter by positive gas molecule ions produced by α-ray irradiation are experimentally evaluated in helium, argon, nitrogen, and helium-argon mixture gases. The dependencies of the diffusion charging process of particles on ion species of positive helium, argon, and nitrogen ions are quantitatively well explained by a numerical solution of the population balance equations with the use of Fuchs' combination probability between particles and ions [N. A. Fuchs, Geofis. Pura Appl. 56, 185 (1963)]. The quantity of charge on particles decreases with an increase of ion mass in the order of the helium, nitrogen, and argon ions. The particle charging in a helium-argon mixture is determined by the ion concentration of both species.
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U2 - 10.1063/1.339368
DO - 10.1063/1.339368
M3 - Article
AN - SCOPUS:0012262023
SN - 0021-8979
VL - 62
SP - 3050
EP - 3052
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 7
ER -