Self indicating radiation alert dosimeter
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United States of America Patent
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Jan 13, 2009
Grant Date -
Jul 6, 2006
app pub date -
Feb 26, 2004
filing date -
Feb 27, 2003
priority date (Note) -
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Abstract
Described as a self-indicating instant radiation dosimeter (1001) for monitoring high energy radiations, such as X-ray. The dosimeter contains a radiation sensitive, color changing, indicating composition (10), e.g., a diacetylene (R--C.ident.C--C.ident.C--R', where R and R' are substituents groups) or a radiochromic dye, a polymeric binder (20) and optionally a shelf life extender (50) or an activator (40). The radiation sensitive composition (10) changes color instantly when exposed to high energy radiation. The dose is estimated by comparing the color with a color reference chart or more accurately with a spectrophotometer or an optical densitometer. The radiation sensitive composition (10) is protected from low energy radiation such as UV light, by a layer of low energy absorbing materials, such as UV absorbers.
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