The Calibration of a Conventional X-ray Fluorescence Analyzer for Depth Profiling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00235304" target="_blank" >RIV/68407700:21340/15:00235304 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Calibration of a Conventional X-ray Fluorescence Analyzer for Depth Profiling

Popis výsledku v původním jazyce

The X-ray fluorescence analysis (XRF) is established as a technique for the determination of depth distribution of elements. In certain applications, the confocal modality cannot be used, there is a possibility of the conventional XRF. These applicationsare mostly performed in the research of cultural heritage objects where portable device for analysis is demanded. The Ka/Kb or La/M X-ray lines ratios where used for obtaining calibration diagrams of different depth distributions of the elements. The principle of the proposed Ka/Kb technique lies in the different absorption coefficients for the Ka and Kb lines. If an element is present at some depth, its characteristic radiation has to penetrate through thick layer of the matrix, and the characteristicX-ray fluxes are significantly changed. The depth of the layer can be described by K?/K? ratio of an element; i.e. lower ratio indicates deeper position. The experimental part includes measurements of standards of several elements from t

Název v anglickém jazyce

The Calibration of a Conventional X-ray Fluorescence Analyzer for Depth Profiling

Popis výsledku anglicky

The X-ray fluorescence analysis (XRF) is established as a technique for the determination of depth distribution of elements. In certain applications, the confocal modality cannot be used, there is a possibility of the conventional XRF. These applicationsare mostly performed in the research of cultural heritage objects where portable device for analysis is demanded. The Ka/Kb or La/M X-ray lines ratios where used for obtaining calibration diagrams of different depth distributions of the elements. The principle of the proposed Ka/Kb technique lies in the different absorption coefficients for the Ka and Kb lines. If an element is present at some depth, its characteristic radiation has to penetrate through thick layer of the matrix, and the characteristicX-ray fluxes are significantly changed. The depth of the layer can be described by K?/K? ratio of an element; i.e. lower ratio indicates deeper position. The experimental part includes measurements of standards of several elements from t

Druh

O - Ostatní výsledky

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

<a href="/cs/project/DF12P01OVV034" target="_blank" >DF12P01OVV034: Průzkum sbírkových předmětů z fondů NTM moderními fyzikálními a chemickými metodami s cílem zkvalitnit jejich restaurování a preventivní konzervaci.</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů