University of Gaziantep, Department of Engineering Physics, Gaziantep, Turkey.
University of Gaziantep, Department of Engineering Physics, Gaziantep, Turkey.
Appl Radiat Isot. 2022 Dec;190:110462. doi: 10.1016/j.apradiso.2022.110462. Epub 2022 Sep 16.
In this study, the thermoluminescence (TL) properties of the calcite conducted by bacterial calcium carbonate (CaCO) precipitation (BCCP) in organic soils were investigated. The bacterial calcium carbonate (CaCO) precipitation (BCCP) is a popular technique and has been applied in a variety of civil and geotechnical engineering applications. For example, bacterial calcium carbonate precipitation fills the gaps on the organic ground and makes cementing it with the biological method using bacteria. The study reveals that the calcium carbonate mineral called as calcite has a clear TL glow curve with four main peaks located around 90, 140, 210 and 240 °C, a wide linear dose response region between 140Gy and 2.3 kGy is observed. In addition, a good reusability is seen in the high temperature peaks. The TL glow curve peaks are not affected by reusability. Although the dosimetric peaks at 210 and 240 °C appear to be nearly constant, the TL peak intensities at 90 °C and 140 °C completely faded after 24 and 336 h storage time, respectively. The activation energies (E) and frequency factors (s) for peaks at 90 °C, 140 °C, 210 °C and 240 °C were evaluated via variable heating rate (VHR). The activation energy of the peaks in the TL glow curve is lying between 0.57eV and 1.04 eV.
在这项研究中，通过细菌碳酸钙（CaCO）沉淀（BCCP）在有机土壤中进行了方解石的热释光（TL）性质研究。细菌碳酸钙（CaCO）沉淀（BCCP）是一种流行的技术，已应用于各种土木和岩土工程应用中。例如，细菌碳酸钙沉淀填补了有机地面的空隙，并使用细菌以生物方法使其胶结。研究表明，称为方解石的碳酸钙矿物具有清晰的 TL 发光曲线，四个主要峰位于 90、140、210 和 240°C 左右，在 140Gy 和 2.3kGy 之间观察到宽的线性剂量响应区域。此外，在高温峰中观察到良好的可重复使用性。TL 发光曲线峰不受可重复性影响。尽管在 210°C 和 240°C 处的剂量计峰似乎几乎恒定，但在 90°C 和 140°C 的 TL 峰强度在分别储存 24 和 336 小时后完全消失。通过变速加热（VHR）评估了 90°C、140°C、210°C 和 240°C 处峰的激活能（E）和频率因子（s）。TL 发光曲线中峰的激活能介于 0.57eV 和 1.04eV 之间。
