• misurazione di radiazioni
• radiation measurement
• dosimetria
• dosimetry

Personal dosimetry can be done by means of the thermoluminescent detectors (TLD). The nuclear research centre SCK•CEN (Dutch: Studiecentrum voor Kernenergie; French: Centre d'Étude de l'énergie Nucléaire) uses a whole body TLD system based on Lithium Fluoride (LiF) with addition of Magnesium and Titanium. This SCK•CEN personal dosimetry system is nearly 30 years old, reaching the end of its life. Because the same system is no longer available on the market, a completely new dosimetry system will be needed.
One of the possible dosimetry system candidates is the one based on Direct Ion Storage (DIS) technology. This is a system in-between passive and active dosimetry and has some remarkable advantages compared to present systems. This dosimeter, commercially known as Instadose 2, can communicate its results through a Bluetooth connection and should no longer be sent back to the dosimetry service.
The objective of this work is to test this system for implementation in routine. This encompasses practical issues, like calibration and quality control issues, but also more formal type testing according to IEC International Standard 62387 “Radiation protection instrumentation – Passive integrating dosimetry systems for personal and environmental monitoring of photon and beta radiation”. This was done through a study on repeatability, a study on angular and energy response and environmental influences.
The work is subdivided in three chapters. In the first chapter, the Introduction, is shown the different types and the sources of ionizing radiation, their health effects on human body and the reason why is important to measure and to control the given dose related to exposures to ionizing radiation. Furthermore, in the final part of this chapter is shown on overview of the tests that are typically required to assess the quality of a certain dosimetry system.
The second chapters of this work shows the evolution of passive dosimetry system from TLD to the first DIS-based dosimeter, namely DIS-1, and finally to the new Instadose devices.
The third chapter shows an analysis of the result of the test performed on the Instadose 2 dosimeter.