Distribution of chlorine in quartz determined by neutron beam focusing prompt gamma activation analysis and micro-x-ray fluorescence

2003 ◽  
Vol 18 (10) ◽  
pp. 2486-2493 ◽  
Author(s):  
H. Heather Chen-Mayer ◽  
William J. Heward ◽  
Rick L. Paul ◽  
Frederic J. Klug ◽  
Yan Gao
Keyword(s):  
Activation Analysis ◽  
Analytical Techniques ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Distribution Analysis ◽  
Gamma Activation ◽  
X Ray ◽  
Beam Focusing ◽  
Ideal System ◽  
Prompt Gamma Activation

This paper describes two spatially resolved analytical techniques for chlorine distribution analysis in high-purity quartz glass. The first, prompt gamma activation analysis (PGAA), to which most of this paper is devoted, is emphasized because a new neutron focusing technique has made this study feasible. Despite the low concentration of chlorine, the neutron absorption cross section for Cl is about 200 times greater than for Si, making Cl in Si an ideal system for PGAA. The second technique described is micro-x-ray fluorescence using a laboratory-based spectrometer. The results from each technique and their ability to quantify low levels of chlorine (400–1800 μg Cl/g SiO2) are described.

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

scholarly journals An Archaeometallurgical Investigation on Metal Samples from the Chiaravalle Cross

Heritage ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 836-847 ◽  
Author(s):  
Daniela Di Martino ◽  
Enrico Perelli Cippo ◽  
Antonella Scherillo ◽  
Zsolt Kasztovszky ◽  
Ildikó Harsányi ◽  
...  
Keyword(s):  
Activation Analysis ◽  
Complex Structure ◽  
Unknown Origin ◽  
Mineralogical Composition ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
13Th Century ◽  
Gamma Activation ◽  
X Ray ◽  
Manufacturing Techniques

The production and manufacturing techniques of metals involve expertise, and the study of ancient artifacts relies on interdisciplinary skills. Metalworking processes used in the production of jewelry masterpieces can, for example, give indications on the provenance of an ancient object of an unknown origin and the techniques used. In this regard, metallic samples from the Chiaravalle Cross (a beautiful processional cross with a complex structure, dating to the 13th century) have been studied, combining bulk and point measurements. Neutron-based experiments (like Prompt Gamma Activation Analysis and neutron diffraction) provide the bulk of the elemental and mineralogical composition, while particle induced X-ray emission analyses evidenced important details on its manufacturing techniques.

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