Zahlavi

Joint seminars of the NPI

The joint seminars of the Nuclear Physics Institute are reserved for subjects extending the scope of interests of one department (mainly seminars of the important guests, reviews on NPI groups and the outstanding results, usually in English).

Next seminar:

21. 5. 2026

RNDr. Vladimír Havránek, CSc. (OU ÚJF): MeV Ion Microbeam at NPI Řež: History, Principles, and Applications

Abstract:

The installation of a new 3 MV TANDETRON electrostatic accelerator in 2006 enabled the implementation of the MeV ion microbeam technique at our laboratory. The accelerator delivers ion beams with sufficient stability and intensity to generate well‑focused microbeams of H, He, C, N, and O ions. Test experiments were also successfully performed with heavier ions up to Cu.
The microbeam is utilized both for spatially resolved ion‑beam analysis, including micro‑PIXE, micro‑RBS, micro‑NRA, and STIM, and for maskless, direct material modification using the Ion Beam Writing (IBW) technique. These capabilities enable high‑resolution elemental and structural characterization as well as controlled local modification of a wide range of materials.
The ion beam current can be regulated over a wide dynamic range, from several nanoamperes down to a few ions per second. This flexibility significantly broadens the scope of applications, ranging from micromachining and writing in optical and technical glasses, through single‑ion irradiation, to the formation and investigation of individual ion tracks. In addition, the microbeam facility is suitable for testing and characterization of particle detectors, including localized charge‑collection and radiation‑response studies. Examples of different application in will be provided.

28. 5. 2026

Ing. Jiří Kmošek (ONIM ÚJF): Early copper metallurgy in ancient Egypt and Nubia - current state of research of the Ph.D. research project

Abstract:

The main research questions addressed within this PhD research project are related to the issues of the lead isotope and trace element signature of the Eastern Desert and Nubian copper ores, the provenance of early Egyptian and Nubian copper, the material properties and composition of these arsenical copper and tin bronze alloys and their diffusion within Egyptian and Nubian societies. As part of this research project, implemented since the beginning of 2020, more than 3500 ancient Egyptian artefacts made of copper alloys were analytically examined. Vide range of analytical methods, available only in selected European laboratories, were used to study the technological and provenance aspects of these artefacts. Metallurgical questions are answered by the combination of analytical methods such as optical microscopy, Vickers microhardness tests, pXRF, ED-XRF, SEM/EDS/WDS and µXRD. Provenance questions are discussed with the help of ED-XRF, INAA, µPIXE, HR-ICP-MS and HR-MC-ICP-MS. Part of the research took place directly in Egypt on the archaeological material excavated at the prehistoric sites of Giza, Elephantina, Tell el-Farkha, Tell el-Retaba, etc. in cooperation with the foreign Egyptological expeditions and using the portable analytical techniques. The lecture will present the main results of the research project and the current state of research.

Archive of seminars:

2026

2025

2024 

2023

2022

  • Monday, September 9, 2019 - 10:00
    A. Turbiner (ICN-UNAM, Mexico and Stony Brook University, USA) 
    Choreography in Physics

 

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