【摘要】：X射線吸收精細(xì)結(jié)構(gòu)譜(X-ray Absorption Fine Structure,XAFS)能夠提供待測(cè)元素的配位數(shù)、鍵長(zhǎng)和價(jià)態(tài)結(jié)構(gòu)信息等,且不依賴(lài)樣品長(zhǎng)程有序的晶體結(jié)構(gòu)、對(duì)元素有選擇性,是一種研究物質(zhì)結(jié)構(gòu)的重要手段,廣泛應(yīng)用于多學(xué)科領(lǐng)域,如能源、材料、環(huán)境、生物以及考古學(xué)等。通常,在X射線吸收精細(xì)結(jié)構(gòu)譜學(xué)測(cè)量中,同步輻射的光斑大小在微米至毫米量級(jí),樣品為均一的樣品。然而,在一些實(shí)際研究體系中,特別是文化遺產(chǎn)領(lǐng)域的研究中,樣品珍貴、種類(lèi)多樣、其空間分布不均一而且復(fù)雜,亟需發(fā)展空間分辨的X射線吸收精細(xì)結(jié)構(gòu)光譜,以便更準(zhǔn)確表征在空間維度上的物質(zhì)結(jié)構(gòu)。本論文的主要工作是基于北京同步輻射光源,利用毛細(xì)管共聚焦方法,搭建了一套可移動(dòng)的、深度分辨的、且適用于常規(guī)XAFS線站的微區(qū)共聚焦XAFS實(shí)驗(yàn)裝置,用以拓展常規(guī)XAFS的實(shí)驗(yàn)方法。本論文的另一個(gè)重要工作為:共聚焦XAFS裝置的應(yīng)用研究。選擇明代祭紅陶瓷釉層作為研究對(duì)象,應(yīng)用共聚焦XAFS無(wú)損探測(cè)呈色元素銅的價(jià)態(tài)在深度方向的演變規(guī)律,重新認(rèn)識(shí)祭紅呈色機(jī)制。
[Abstract]:X-ray absorption fine structure spectroscopy (X-ray Absorption Fine Structure,XAFS) can provide the coordination number, bond length and valence structure information of the elements to be measured, and does not depend on the long-range ordered crystal structure of the sample, so it has selectivity to elements. Is an important means to study material structure, widely used in multi-disciplinary fields, such as energy, materials, environment, biology, archaeology and so on. Generally, in X-ray absorption fine structure spectroscopy measurement, the spot size of synchrotron radiation is in the order of micron to millimeter, and the sample is homogeneous. However, in some practical research systems, especially in the field of cultural heritage, the samples are precious and diverse, and their spatial distribution is uneven and complex. It is urgent to develop space-resolved X-ray absorption fine structure spectra. In order to more accurately represent the spatial dimension of the physical structure. The main work of this paper is based on Beijing synchrotron radiation light source, using capillary confocal method, a set of mobile, depth-resolved, micro-confocal XAFS experimental equipment is built, which is suitable for conventional X-ray stations. It is used to expand the experimental method of conventional XAFS. Another important work of this thesis is the application of confocal XAFS device. By using confocal XAFS nondestructive detection of the valence state of copper in the depth direction of the red ceramic glaze of Ming Dynasty as the research object, the mechanism of the color rendering of the red worship was re-understood.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：O434.1

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