Advantages
The film badge has several advantages over other types of dosimetry:
- Permanent record of exposure: The developed film is physical evidence of the radiation exposure. The film can be stored after developing and reading, and could be reviewed at a later date if there is a query over exposure.
- Exposure pattern discrimination: A film badge offers limited discrimination between different patterns of exposure. A single exposure tends to leave sharp shadows on the film from the filters, whereas multiple small exposures at different angles will leave a rim of blurring around the filters. This may allow the linking of a dose with a specific incident and provides a degree of protection against tampering (e.g. deliberate exposure to a radiation source).
- Radiation type detection: Use of multiple filters allows separate measurement of beta and gamma exposure, and estimation of energy spectra. Additional filters can be added to detect neutron radiation (e.g. cadmium). The sensitivity of film to low energy (< 20 keV) gamma or x-radiation can be better than electronic dosimeters.
Read more about this topic: Film Badge Dosimeter
Famous quotes containing the word advantages:
“Men hear gladly of the power of blood or race. Every body likes to know that his advantages cannot be attributed to air, soil, sea, or to local wealth, as mines and quarries, nor to laws and traditions, nor to fortune, but to superior brain, as it makes the praise more personal to him.”
—Ralph Waldo Emerson (1803–1882)
“A woman might claim to retain some of the child’s faculties, although very limited and defused, simply because she has not been encouraged to learn methods of thought and develop a disciplined mind. As long as education remains largely induction ignorance will retain these advantages over learning and it is time that women impudently put them to work.”
—Germaine Greer (b. 1939)
“In 1845 he built himself a small framed house on the shores of Walden Pond, and lived there two years alone, a life of labor and study. This action was quite native and fit for him. No one who knew him would tax him with affectation. He was more unlike his neighbors in his thought than in his action. As soon as he had exhausted himself that advantages of his solitude, he abandoned it.”
—Ralph Waldo Emerson (1803–1882)