**2.2 TL sensitivity**

The sensitivity of TLD should be evaluated for competitor's materials to determine the dose linearity, sub linearity or supralinearity behavior of phosphors. The sensitivity and thermal stability of glass samples were found to be dependent on both the starting materials and the method of preparation in Refs. [9–13].

#### **2.3 Dose rate dependence**

TL dosimeters, in general, have demonstrated no dose rate effects over a wide range.

### **2.4 Stability**

TL is the release, in the form of visible light, of energy absorbed from previous irradiation. The rate at which this energy is released is dependent upon the phosphor temperature and increases sharply at a higher temperature. Even though the concept of "glow peak temperature" that temperature at which the maximum of the glow peak occurs, is both useful and easily demonstrated. It should be remembered that a finite rate of loss of stored energy exists even for much lower temperatures. If a phosphor shows an insignificant loss of TL at room temperature, it is said to have good stability.
