seminars_he

Thermal Luminesce effect in Dosimetry Applications

סמינר כימיה פיזקאלית ואנאליטית

מרצה: Lotem Buchbinder

תאריך:
22-22 Jan 2019 @ 15:30

מיקום: חדר סמינרים פקולטי

Abstract:

Thermoluminescence (TL) is a known phenomenon from the 16th century, but only during the 1950s it was suggested as a technique in thermoluminescence dosimetry (TLD). TLD is a versatile method for the assessment of exposure dose resulting from ionizing radiation. Generally, TL materials are insulators with wide band gap host crystals activated by transition metal or rare earth ions. The wide variety of TLD materials and their different physical forms allow the determination of different radiation exposure levels ranging from microGy to kGy. I will describe the fundamentals of TL mechanism and present an overview of the leading materials presently used for TLD. Although TLD has been used for many years in a wide range of applications such as medicine, food, space, nuclear industry, etc.; new materials are constantly being proposed and the physical mechanism is still under active study. I will focus on recent research concerning the most commonly used TLD material LiF:TiMg and a suggested new TLD material: household salt.