Portal de Periódicos da CAPES

An Improved Thermoluminescence Dosimetry System

1967; Lippincott Williams & Wilkins; Volume: 13; Issue: 6 Linguagem: Inglês

10.1097/00004032-196706000-00004

1538-5159

W. J. Hartin,

Radioactivity and Radon Measurements

By bonding LiF powder to a high temperature plastic with a transparent high temperature binder it has been possible to produce a re-usable film badge with the advantages of LiF dosimetry. Because both the plastic and the binder are low Z materials, it is possible to preserve the linear energy response which is one of the advantages of LiF. Since the amount of active material on each dosimeter is fixed, the dosimeter may be accurately calibrated. Obviously this approach simplifies LiF dosimetry because it eliminates the handling and measurement of loose powder. Because the material is in the form of a piece of film of the same size as a standard film badge, it has been possible to work out improved methods for heating it. The photomultiplier tube now views a constant temperature source, thus essentially eliminating variations in background currents. This opens the way to measurement of much lower doses. Because a constant temperature source is used, the heating cycle can be accurately controlled, thus improving reading accuracy. The dosimeters are being developed in a form which will facilitate automatic reading, identification, and printout of results.