抄録
Production of aerosol counter has been reported on several occasions but so far theoretical or experimental relation of the pulse height observed by the counter to the aerosol particle size has not been referred to.
Mie's theorem on light scattering is used to compute this relation. With a convergent beam of incident light, scattered light from aerosol particles is received by the counter on the forward front and on the lateral side, and the respective pulse heights are observed.
Denoting the incident light wavelength by λ(0) and the particle radius by R0, and assuming the refractive index of the particle to be 1.33, the following results are obtained: (1) The pulse is higher with the frontal receiving system than with the lateral receiving system. (2) In receiving the light from the forward front, the curve representing the relation between the pulse height and R0 or x(=2πR0/λ(0)) has a maximum of pulse height at R0=O.55μ or x_??_7.0. On the other hand, in receiving the light from the side, the pulse height increases gradually with the increase of R0.
