Twenty Five Years of TL-Dose Measurements at the NRC-NEGEV

In the early years, the routine personal dosimetry at the Nuclear Research CenterNegev was performed by using photographic films. In 1975, the TLD method was introduced. The routine personal dosimetry was performed by using the LiF:Mg, Ti phosphors (G-1 cards), and employing an automatic Harshaw 2271 reader. The heating of the phosphor was performed by a hot finger, and the integral light output was the basis for the exposure evaluation. From 1994, we are using a new automatic TLD reader (Harshaw/Bicron 6600) with new LiF:Mg, Ti cards. The chips are heated by a Nitrogen jet, and CGCD Computerized Glow Curve Deconvolution (1, 2) can be performed.