Modelling quartz luminescence signal dynamics relevant for dating and dosimetry

模拟与约会和剂量测定相关的石英发光信号动力学

• 批准号: 279969851
• 负责人: Privatdozent Dr. Christoph Schmidt
• 金额: --
• 依托单位: Bereich Physische Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/279969851?language=en
• 关键词: Modelling; quartz; luminescence; signal; dynamics

Both thermally stimulated (TL) and optically stimulated luminescence (OSL) of quartz are important dating techniques in archaeology and Earth-Sciences. For obtaining reliable and precise dating results, a profound understanding of the complex processes of charge transfer in the crystal lattice is essential. Recent kinetic quartz luminescence models significantly contribute to adapting existing theories to experimental observations, by simulating quartz luminescence behaviour for different scenarios (e.g., sedimentary history, laboratory measurement conditions). Although the variety of diverse existing quartz models partially appear to succeed in simulating realistic TL and OSL signals, quartz radiofluorescence (RF, luminescence emitted during ionizing irradiation) behaviour differs substantially from model predictions. This project aims at further developing and improving "traditional" kinetic as well as stochastic ("Monte Carlo") models towards an integrated and more comprehensive model capable of reproducing a much wider range of observed luminescence phenomena (e.g., RF signal dynamics, change in peak emission wavelength with measurement temperature) as well as reflecting the range of different luminescence behaviour observed among quartz samples from different geological or geographical origin and with various sedimentary history.

石英的热释光和光释光都是考古学和地球科学中重要的测年技术。为了获得可靠和精确的测年结果，深入了解晶格中电荷转移的复杂过程是必不可少的。最近的动力学石英发光模型通过模拟不同场景的石英发光行为（例如，沉积历史、实验室测量条件）。虽然各种不同的现有石英模型部分出现成功地模拟现实TL和OSL信号，石英放射性荧光（RF，电离辐射过程中发出的发光）行为与模型预测有很大不同。该项目旨在进一步开发和改进“传统”动力学模型以及随机（“蒙特卡罗”）模型，以建立一个综合和更全面的模型，能够再现更广泛的观察到的发光现象（例如，RF信号动力学、峰值发射波长随测量温度的变化）以及反映在来自不同地质或地理来源和具有不同沉积历史的石英样品中观察到的不同发光行为的范围。

项目成果

Making the invisible visible: observing the UV-reversal effect in quartz using radiofluorescence

让不可见变得可见：使用放射荧光观察石英中的紫外线反转效应

• DOI: 10.1088/1361-6463/aacfd0
• 发表时间: 2018
• 期刊: Journal of Physics D: Applied Physics
• 作者: Friedrich;J. Kreutzer;Schmidt
• 通讯作者: Schmidt

Radiofluorescence as a detection tool for quartz luminescence quenching processes

• DOI: 10.1016/j.radmeas.2018.03.008
• 发表时间: 2018-12-15
• 期刊: RADIATION MEASUREMENTS
• 影响因子: 2
• 作者: Friedrich, Johannes;Kreutzer, Sebastian;Schmidt, Christoph
• 通讯作者: Schmidt, Christoph

On the dose rate dependence of radiofluorescence signals of natural quartz

• DOI: 10.1016/j.radmeas.2018.02.006
• 发表时间: 2018-04
• 期刊: Radiation Measurements
• 影响因子: 2
• 作者: Johannes Friedrich;M. Fasoli;S. Kreutzer;Christoph Schmidt

Solving ordinary differential equations to understand luminescence : 'RLumModel', an advanced research tool for simulating luminescence in quartz using R

求解常微分方程以了解发光：“RLumModel”，一种使用 R 模拟石英发光的高级研究工具

• DOI: 10.1016/j.quageo.2016.05.004
• 发表时间: 2016
• 期刊: Quaternary Geochronology
• 影响因子: 2.7
• 作者: Friedrich;J. Kreutzer;Schmidt
• 通讯作者: Schmidt

Quartz radiofluorescence: a modelling approach

• DOI: 10.1016/j.jlumin.2017.02.039
• 发表时间: 2017-06
• 期刊: Journal of Luminescence
• 影响因子: 3.6
• 作者: Johannes Friedrich;V. Pagonis;Reuven Chen;S. Kreutzer;Christoph Schmidt