The energy response of lithium fluoride (LiF) thermoluminescent dosemeters has been determined at two temperatures. Glow peaks 3,4, and 5 are measured at 240 degrees C and peaks 6 and 7 at 300 degrees C. In studying the response to X-radiation it was observed that the response of LiF chips to photons below 150 keV is greater, relative to cobalt-60, than that expected from the energy absorbed in the material. There is an enhancement of 10% at 240 degrees C and of about 100% at 300 degrees c for the same energy absorption. This effect is particularly important where precise measurement of X-ray dose is required and corrections of from 10 to 15% above the correction from rads in LiF to rads in water will be necessary depending upon the maximum read-out temperature. Qualitatively the enhancement may be explained in terms of the higher mean rate of linear energy transfer at low photon energies relative to cobalt-60 gamma rays.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.