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Your search keyword '"Kromka, A."' showing total 42 results
Start Over Author "Kromka, A." Publication Type Conference Materials
42 results on '"Kromka, A."'

5. Verification of 11B(p, α1)8Be nuclear reaction boron analysis in homogeneous films.

Author

Dobrovodský, Jozef, Vaňa, Dušan, Ptačinová, Jana, Kromka, Alexander, and Riedlmajer, Robert

Subjects
PROTON beams, ION analysis, HEAVY elements, ION beams, DEPTH profiling, BORON, BORON steel, NUCLEAR reactions
Abstract

The aim of our work was to verify the quantification of boron content by 730 keV and 2640 keV proton beams using Nuclear Reaction Analysis (NRA) and Elastic Backscattering Spectrometry (EBS) analysis. The evaluation procedure of 11B(p,α1)8Be nuclear reaction boron measurements in homogeneous layers in heavy and light matrix was assessed. The sensitivity of our Ion Beam Analysis (IBA) setup to boron analyses was also tested. More common is boron analysis by 11B(p,p0)11B elastic backscattering and 11B(p,α0)8Be nuclear reactions. But in the case of (p,p0) the signal of heavier matrix elements interferes with the boron signal and by lower content it makes boron quantification even impossible. With (p,α0) it is also possible to obtain a depth concentration profile, but the overall sensitivity is more than one order of magnitude higher in the case of (p,α1). The achieved measurement sensitivity 15 atomic ppm with (p,α1) can be easily enhanced by increasing the fluence of protons and inserting an absorber in front of the detector, so that the sensitivity bellow 1 at. ppm can be reached. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Callus remodelling model.

Author

Miodowska, Justyna, Bielski, Jan, and Kromka-Szydek, Magdalena

Subjects
CALLUS, BONE regeneration, BONE resorption, RESORPTION (Physiology), ABSORPTION (Physiology)
Abstract

The objective of this paper is to investigate the healing process of the callus using bone remodelling approach. A new mathematical model of bone remodelling is proposed including both underload and overload resorption, as well as equilibrium and bone growth states. The created model is used to predict the stress-stimulated change in the callus density. The permanent and intermittent loading programs are considered. The analyses indicate that obtaining a sufficiently high values of the callus density (and hence the elasticity) modulus is only possible using time-varying load parameters. The model predictions also show that intermittent loading program causes delayed callus healing. Understanding how mechanical conditions influence callus remodelling process may be relevant in the bone fracture treatment and initial bone loading during rehabilitation. [ABSTRACT FROM AUTHOR]

Published
2017
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