The Use of Monte Carlo Simulation Technique for the Design of a H*(10) Dosemeter Based on TLD-100

Beschreibung

The operational quality, ambient dose equivalent, H*(10), is recommended for area monitoring providing a reasonable estimate of the protection quantity effective dose to verify the observance of dose limits at public places and in addition to personal dosemeters. For area monitoring low-dose measurements of external photon radiation fields thermoluminescence (TL) detectors and appropriate filter materials were combined in order to design a passive H*(10) dosemeter. Due to its near tissue-equivalent energy response the standard TL material LiF:Mg,Ti (TLD-100) was chosen as the basic detector material. The necessary predefined energy response of the dosemeter measuring the quantity ambient dose equivalent independently of applied photon radiation energies and the required isotropic response of a H*(10) dosemeter was primarily achieved by using the Monte Carlo simulation method. Variation of detector position in the dosemter, appropriate superpositioning of TL detector signals and geometrical variations of the dosemeter filter layers were only possible with long series of computer simulations. Each step of the optimisation iteration procedure was concluded by a verification experiment. All experiments were carried out in well defined standard photon radiation fields providing not only verification but also input data for succeeding iteration step computer simulations. The use of Monte Carlo simulation technique in combination with verification experiments improved the search for appropriate filter materials and made a high degree optimisation process of geometrical arrangements of TL detectors and filter layers possible to get a suitable passive H*(10) dosemeter for area monitoring with low directional and energy dependence.

Zeitraum	9 Juli 2001 → 13 Juli 2001
Ereignistitel	13th International Conference on Solid State Dosimetry
Veranstaltungstyp	Sonstiges
Bekanntheitsgrad	International