Simultaneous forward- and backward-hemisphere elastic-light-scattering patterns of respirable-size aerosols |
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Authors: | Fernandes Gustavo E Pan Yong-Le Chang Richard K Aptowicz Kevin Pinnick Ronald G |
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Affiliation: | Department of Applied Physics and Center for Laser Diagnostics, Yale University, New Haven, Connecticut 06520-8284, USA. gustavo.fernandes@yale.edu |
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Abstract: | Two-dimensional angular optical scattering (TAOS) patterns of aerosols are measured simultaneously from the forward hemisphere 15 degrees < theta < 90 degrees as well as the backward hemisphere 90 degrees < theta < 165 degrees (detecting 63% of the 4pi sr of scattered light) by using an ellipsoidal reflector and an intensified CCD detector. TAOS patterns were obtained from polystyrene-latex spheres (individuals and aggregates) and from single Bacillus subtilis spores. These information-rich patterns, measured with a single laser pulse for individual particles on the fly, suggest that forward-TAOS and backward-TAOS measurements may be used for rapid classification of single aerosol particles. |
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