Thermoluminescence kinetics of natural potassium feldspar

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Thermoluminescence kinetics of natural potassium feldspar

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- Thermoluminescence kinetics of natural potassium feldspar
- NUCLEAR TECHNIQUES Issue 12, (1998)
- 作者机构：
  
  1. 香港城市大学
  2. 中山大学,广州
  3. ,510275
- 作者简介：
- 基金信息：
- DOI：
  CLC： P578
- Published：01 December 1998
- 稿件说明：
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[1]梁宝鎏,StokesMJ,张纯祥,罗达玲.天然钾长石热释光峰的动力学特性研究[J].核技术,1998(12):718-724.

Thermoluminescence kinetics of natural potassium feldspar[J]. Nuclear techniques, 1998, (12): 718-724.
[1]梁宝鎏,StokesMJ,张纯祥,罗达玲.天然钾长石热释光峰的动力学特性研究[J].核技术,1998(12):718-724. DOI：

Thermoluminescence kinetics of natural potassium feldspar[J]. Nuclear techniques, 1998, (12): 718-724. DOI：

摘要

研究了天然钾长石的热释光动力学特性与γ射线辐射剂量的关系。用不退火处理样品和用不同剂量辐照的方法，观测到位于160℃和248℃的两个热释光峰。前者峰高与γ剂量有关，后者峰高基本不随γ剂量而变化。经退火处理后的样品，只存在与剂量有关的发光峰。160℃的发光峰形和峰温都不随γ辐射剂量增加而变化。用初始升温法测定该发光峰的激活能级为1．0eV。用一般级动力学方程拟合得到的动力学级数表明该发光峰非常接近二级。从峰形对称性和峰半宽度来看，属非一级动力学峰。这一实验结果说明非一级动力学峰的峰形和峰温不随辐照剂量增加而变化。

Abstract

The dose responses of natural potassium feldspar irradiated by gamma rays were measured without annealing of the powder samples. Two glow peaks are observed at 160℃ and 248℃ in the glow curves respectively. The height of the 160℃ glow peak is dependent on the radiation dose while the peak temperature is not related to the dose. However

the glow peak of 248℃ is independent of the radiation dose. Using the activation energy of the 160℃ peak obtained by the initial rise method

the kinetic order of the peak can be determined by fitting the glow curves with the general order kinetics. The results show that the kinetic order of this peak is approximately 2

i.e. the non-first order

and both temperature and shape of the peak keep unchanged do not change while increasing irradiated dose.

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