Gamma-radiation-induced change in the activation energy of TL traps in LiRbSO4: Tl

✍ Scribed by M.E. Kassem; M.A. El-Kolaly; L.I. Al-Houty

• Book ID: 103989679
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 384 KB
• Volume: 45
• Category: Article
• ISSN: 0969-8043
• DOI: 10.1016/0969-8043(94)90253-4

✦ Synopsis

Thermoluminescence

(TL) measurements were carried out for pure and doped LiRbSO,. with different concentrations of thallium (Tl). The glow-curve range of measurement is between room temperature up to 300 C. The radiation absorbed dose is in the range 5663.2 x IO' Gy. The results show that both pure and doped samples have glow peak temperatures that are dose dependent, and vary between 70-X0 C and 140-I7O'C for pure and doped samples respectively. Doped samples display double peaks that increase with dopant concentration up to about 0.7% wt. The second peak which occurs at high temperature increases linearly with dose up to 4500 Gy. From the results it is proposed that LiRbSO, doped with 0.7% TI can be used for dosimetric purposes in this range. The activation energies of structural transitions are estimated and the results are discussed on the basis of radiation-induced stable dipoles in the random field system.