RESUMO
Research investigating the application of pressure-cycled bubble chambers to fast neutron detection is described. Experiments with a Halon-filled chamber showed clear sensitivity to an AmBe neutron source and insensitivity to a (137)Cs gamma source. Bubble formation was documented using high-speed photography, and a ceramic piezo-electric transducer element registered the acoustic signature of bubble formation. In a second set of experiments, the bubble nucleation response of a Freon-134a chamber to an AmBe neutron source was documented with high-speed photography.
RESUMO
Guidelines based on the best science and expert opinion, widely disseminated to our state and local public health departments, private health care providers, and policy makers, will enhance our public health efforts. Communities will finally have information to guide them in developing population-based programs that have proven to be effective, both from the standpoints of health status and cost. The effort described in this article is to test the feasibility of public health practice guidelines.