Radiation protection beta particles

The sample is placed on a photographic film which is protected from the light and allowed to remain in contact long enough for an adequate exposure. The exposure time is dependent upon the intensity of the radiation and can usually only be determined by trial and error. It is possible, however, to predict an approximate exposure time from the fact that a total emission of 107 beta particles per square centimetre is often required. 

Beta particles are negatively charged and smaller, travel faster, and penetrate farther than alpha particles. A beta particle is 1/1800 the size of a proton, or roughly equal to an electron in mass (see Figure 9.5). Beta particles will penetrate the skin and travel from 3 to 100 ft. Full turnouts and SCBAs will not provide full protection from beta particles. Particulate radiation results in contamination of personnel and equipment where the particles come to rest. Electromagnetic energy waves, like gamma, do not cause contamination. 

Use shielding when possible to do so. A piece of plastic that is 0.5-inch thick will protect against most beta particles (depending on energy). Lead shields are the best for gamma and X-ray radiation. 

Fun Body (contj Radiation-contamination protective suit Various types of protective clothing designed to prevent contamination of the body by radioactive particles. Protects against alpha and beta particles. Does NOT protect against gamma radiation. Designed to prevent skin contamination. If radiation is detected on sit consult an experienced radiation expert and evacuate personnel until the radiation hazard has been evaluated. 

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