Dose Response of the E1’ Centre in Quartz

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Geochronometria Pub Date : 2021-01-01 DOI:10.2478/geochr-2020-0037

S. Toyoda, Mana Amimoto

引用次数: 2

Abstract

Abstract The E1’ centre is one of the most common paramagnetic defects observed by electron spin resonance (ESR) in natural quartz, the formation of which is, however, quite complicated. The dose response to gamma ray irradiation of the E1’ centre in natural quartz was systematically investigated in the present study to find that its dose response depends on the heating conditions of the sample before irradiation. The signal intensity decreases on irradiation when quartz has been heated up to 300°C, while it increases when heated above 400°C. The phenomena can be explained by the electronic processes that heating supplies electronic holes to the oxygen vacancies while gamma ray irradiation supplies electrons.

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石英中E1′中心的剂量响应

摘要E1’中心是通过电子自旋共振（ESR）在天然石英中观察到的最常见的顺磁缺陷之一，然而，其形成相当复杂。本研究系统地研究了天然石英E1’中心对伽马射线辐照的剂量响应，发现其剂量响应取决于辐照前样品的加热条件。当石英被加热到300°C时，信号强度在辐照时降低，而当加热到400°C以上时，信号密度增加。这种现象可以用加热向氧空位提供电子空穴而伽马射线照射提供电子的电子过程来解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geochronometria 地学-地球科学综合

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Geochronometria is aimed at integrating scientists developing different methods of absolute chronology and using them in different fields of earth and other natural sciences and archaeology. The methods in use are e.g. radiocarbon, stable isotopes, isotopes of natural decay series, optically stimulated luminescence, thermoluminescence, EPR/ESR, dendrochronology, varve chronology. The journal publishes papers that are devoted to developing the dating methods as well as studies concentrating on their applications in geology, palaeoclimatology, palaeobiology, palaeohydrology, geocgraphy and archaeology etc.