Age determination of monazites using the new experimental chamber of the Cracow proton microprobe

Lekki, Janusz; Lebed, S.; Paszkowski, Mariusz; Kusiak, Monika A.; Vogt, J.; Hajduk, R.; Polak, Wojciech; Potempa, A.; Stachura, Z.; Styczeń, J.

doi:10.1016/s0168-583x(03)01083-8

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…The simultaneous determination of Pb, Th and U allows the determination of geological ages corresponding to the mineral (monazite, zircon) formation [11,18,19]. Assuming that the amount of common Pb and Pb diffusion is negligible the measured Pb concentration can be derived only by Th and U decay.…”

Section: Resultsmentioning

confidence: 99%

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Characterization of uranium and thorium containing minerals by nuclear microscopy

Kertész

Furu

Angyal

et al. 2015

J Radioanal Nucl Chem

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Radioactive minerals of the gneiss of Sopron Mountains were analysed by micro-PIXE method at the Debrecen scanning nuclear microprobe. Zircon and monazite minerals were identified with detectable amount of U and Th. Qualitative elemental maps and quantitative concentration data were obtained on 20 minerals. U and Th concentrations were between few 100 ppm and 10 wt%. The size of the minerals varied between few micrometers and 100 microns, the distribution of U and Th within the grains was inhomogeneous. These radioactive minerals occurred in veins enriched with Fe.

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Section: Resultsmentioning

confidence: 99%

“…Ion beam analytical methods, including micro-PIXE has many advantages in the characterization of mineral samples with complex structures, as it was demonstrated in these studies [7][8][9][10][11]. The 2-3 MeV H ?…”

Section: Introductionmentioning

confidence: 91%

Characterization of uranium and thorium containing minerals by nuclear microscopy

Kertész

Furu

Angyal

et al. 2015

J Radioanal Nucl Chem

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“…The single-step size in the scan operation was set as 1.25 µm. X-Ray data were collected by the PGT Si(Li) detector (80 mm 2 , 162 eV at 5.9 keV) in a proprietary, multiparameter data acquisition system [52].…”

Section: µ-Pixementioning

confidence: 99%

Novel Approach to Tooth Chemistry. Quantification of the Dental-Enamel Junction

Kuczumow¹,

Chałas

Nowak³

et al. 2021

IJMS

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The dentin-enamel junction (DEJ) is known for its special role in teeth. Several techniques were applied for the investigation of the DEJ in human sound molar teeth. The electron (EPMA) and proton (PIXE) microprobes gave consistent indications about the variability of elemental concentrations on this boundary. The locally increased and oscillating concentrations of Mg and Na were observed in the junction, in the layer adhering to the enamel and covering roughly half of the DEJ width. The chemical results were compared with the optical profiles of the junction. Our chemical and optical results were next compared with the micromechanical results (hardness, elastic modulus, friction coefficient) available in the world literature. A strong correlation of both result sets was proven, which testifies to the self-affinity of the junction structures for different locations and even for different kinds of teeth and techniques applied for studies. Energetic changes in tooth strictly connected with crystallographic transformations were calculated, and the minimum energetic status was discovered for DEJ zone. Modeling of both walls of the DEJ from optical data was demonstrated. Comparing the DEJ in human teeth with the same structure found in dinosaur, shark, and alligator teeth evidences the universality of dentin enamel junction in animal world. The paper makes a contribution to better understanding the joining of the different hard tissues.

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“…For measurements, samples were placed in the experimental chamber (vacuum ~ 10 −5 hPa) and positioned in the microprobe focus using an on-line microscope for accurate selection of the investigated area. Additional details about the microprobe experimental setup have been described elsewhere [ 5 ].…”

Section: Methodsmentioning

confidence: 99%

Comparison of PIXE and XRF in the analysis of silver denarii of the early Piast

Lekki

Matosz

Paluszkiewicz

et al. 2017

J Radioanal Nucl Chem

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The collection of denarii from the time of development of a Polish medieval state was studied using the proton induced X-ray emission spectroscopy. The major elements detected for these denarii are Ag and Cu, while minor elements such as Pb, Fe, Au, Bi, and Zn may also be present. The aim of the study was to cross-compare the results with a previous micro-X-ray fluorescence data and to perform a better quantification of the denarii elemental composition, especially for trace elements, providing suggestions of the origin of alloy compounds.Electronic supplementary materialThe online version of this article (doi:10.1007/s10967-017-5556-8) contains supplementary material, which is available to authorized users.

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Age determination of monazites using the new experimental chamber of the Cracow proton microprobe

Cited by 15 publications

References 7 publications

Characterization of uranium and thorium containing minerals by nuclear microscopy

Characterization of uranium and thorium containing minerals by nuclear microscopy

Novel Approach to Tooth Chemistry. Quantification of the Dental-Enamel Junction

Comparison of PIXE and XRF in the analysis of silver denarii of the early Piast

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