Behavior of various Nigerian quartz samples to repeated irradiation and heating

Geochronometria

Ebenezer O. Oniya¹  George Kitis²  George S. Polymeris²  Nestor C. Tsirliganis² 

[1] Adekunle Ajasin University;‘Athena’ — Research and Innovation Center in Information, Communication and Knowledge Technologies

关键词: Quartz;    Thermoluminescence;    110\u00B0C TL glow peak;    High Temperature TL peaks (HTTLPS);    Pre-dose effect;    Sensitization;    luminescence centre;    defects;   

DOI  :  10.2478/s13386-012-0008-2

学科分类：社会科学、人文和艺术（综合）

来源: Politechnika Slaska * Instytut Fizyki

【 摘 要 】

In the present work the sensitization of the entire glow-curve is studied in 6 different quartz samples of Nigerian origin. The investigation was applied to the un-fired “as is” samples as well as to samples fired at 900°C for 1 hour following cooling to room temperature. The results showed that in the case of “as is” glow-curve is sensitized as a whole. There is an abrupt transition from the “natural” sensitivity without any previous heating and the artificial sensitivity induced after the first heating. The sensitization is growing up strongly to the 10th heating but to a lower rate. The sensitization factor of the TL glow-peak at “110°C” was found to be linearly correlated to the higher temperature TL peaks. In the case of annealed samples there is an initial increase between the sensitivity immediately after the end of annealing and after the first heating. As the number of heating is increased up to the 10th heating the sensitization is stabilized at a constant value. The results are discussed in the frame-work of existing models and implications of the sensitization effect in various applications, while some explanations are attempted.

【 授权许可】

Unknown