Extinction Cross-Section Measurements of Bacillus globigii Aerosols
Suzanne C. Walts, Craig A. Mitchell, Michael E. Thomas, and Donald D. Duncan
In a continuing series of experiments designed to determine the spectral extinction cross section of bacterial aerosols, spectral transmittance was measured as a function of particle concentration, and extinction cross sections were calculated. Visible band measurements of Bacillus globigii aerosols indicated a slight increase in the extinction cross section with increasing wavelength. The extinction cross section was estimated to be 2.58 (±0.25)10 8 cm 2 at the 543-nm wavelength.
Transmittance versus wavelength for varying concentrations of Bacillus Globigii. Curves are broadband spectrometer results and boxes are laser results that calibrate the curves.
