Abstract
This paper reports the results of a study using a commercial routine read out system with non-contact hot nitrogen heating and
linear heating gas profiles. Glow curves of LiF:Mg,Ti as well as LiF:Mg,Cu,P were analysed for different linear heating rates
b from 1 to 30 K s 1. Different thermoluminescent detectors (TLDs) of different thicknesses (0.38-0.90 mm) were studied
and compared. By means of the application of CGCD program considering kinetic parameters of the used TL-material the
analysis of the peak temperature of the individual TL peaks lead to the approximation of the real heating profile Tchip(t) in the
TL chip. The real heating profile deviates strongly from linearity and can be characterised by the solution of a differential
equation Tchip(t) ¼ F [Tgas(t)]. The model of this equation is discussed in the paper. The difference between gas and chip
temperatures are heating rate and chip thickness dependent and reach values of up to 100 C (for thick detectors and fast
heating rates). Especially for LiF:Cu,P, knowledge of the real chip temperature is essential, since read out shall be performed
at the highest possible temperature, without destroying the dosimetric properties of the material. On the basis of this work, an
optimisation of the readout parameters for LiF:Cu,P is possible.
Originalsprache | Englisch |
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Seiten (von - bis) | 310-313 |
Seitenumfang | 4 |
Fachzeitschrift | Radiation Protection Dosimetry |
Volume | 119 |
Publikationsstatus | Veröffentlicht - 2006 |
Research Field
- Biosensor Technologies