The application of LiF:Mg,Cu,P to large scale personnel dosimetry: current status and future directions

Abstract

LiF:Mg,Cu,P is starting to replace LiF:Mg,Ti in a variety of personnel dosimetry applications. LiF:Mg,Cu,P has superior characteristics as compared to LiF:Mg,Ti including, higher sensitivity, improved energy response for photons, lack of supralinearity and insignificant fading. The use of LiF:Mg,Cu,P in large scale dosimetry programs is of particular interest due to the extreme sensitivity of this material to the maximum readout temperature, and the variety of different dosimetry aspects and details that must be considered for a successful implementation in routine dosimetry. Here we discuss and explain the various aspects of large scale LiF:Mg,Cu,P based dosimetry programs including the properties of the TL material, new generation of TLD readers, calibration methodologies, a new generation of dose calculation algorithms based on the use of artificial neural networks and the overall uncertainty of the dose measurement. The United States Navy (USN) will be the first US dosimetry processor who will use this new material for routine applications. Until June 2002, the Navy used two types of thermoluminescent materials for personnel dosimetry, CaF2:Mn and LiF:Mg,Ti. A program to upgrade the system and to implement LiF:Mg,Cu,P, started in the mid 1990s and was recently concluded. In 2002, the new system replaced the LiF:Mg,Ti and is scheduled to start replacing the CaF2:Mn system in 2006. A pilot study to determine the dosimetric performance of the new LiF:Mg,Cu,P based dosimetry system was recently completed, and the results show the new system to be as good or better than the current system in all areas tested. As a result, LiF:Mg,Cu,P is scheduled to become the primary personnel dosimeter for the entire US Navy in 2006.

Study of thermoluminescence response of purple to violet amethyst quartz from Balikesir, Turkey

“…LiF:Mg,Cu,P (TLD100H) is starting to replace LiF:Mg,Ti in a variety of personnel dosimetry applications. Lithium Flouride (Lithium natural) (LiF:Mg,Cu,P) has superior characteristics as compared to LiF:Mg,Ti including, higher sensitivity, improved energy response for photons, lack of supralinearity and insignificant fading [28] . Measurements range for the absorbed dose changes from 1 pGy to 10 Gy.…”

Can Computer-assisted Surgery Reduce the Effective Dose for Spinal Fusion and Sacroiliac Screw Insertion?

“…There are limitations comparing observations from different studies because many factors can influence the outcome of the measurement [8,13,16]. One factor with an incalculable effect on the emission of radiation is the size of the patient.…”

“…The TLD-100 is able to measure radiation from any direction independent of the axis of radiation and is widely used for dosimetry for fluoroscopy and tomography. The wide variety of TLD materials and their different physical forms allow the determination of different radiation qualities at dose levels from microGy to kGy [13,16]. The TLDs were placed in 42 positions in the phantom representing the organs.…”

Comparative measurements of external radiation exposure using mobile phones, dental ceramic, household salt and conventional personal dosemeters

“…Firstly, a fourelement TL dosemeter based on the LiF:Mg,Cu,P phosphor in combination with different filters. A description of the dosemeter including the method of H p (10) evaluation is given in and Moscovitch et al (2006). The dosemeter was read by a Harshaw Model 6600 Reader one day after irradiation.…”