01.04.2026
A. A. Sidorin "Generator of Directed Monochromatic Positron Beams for Positron Spectroscopy"
The Positron Annihilation Spectroscopy (PAS) method is sensitive to point defects in solids. The pair of gamma quanta produced in the positron-electron annihilation process carries information about the type and concentration of defects smaller than 10 nm at a depth of up to 1 μm (in dense materials) and up to 15 μm (for light materials), depending on the energy of the positrons.
The PAS facility in the Dzhelepov Laboratory of Nuclear Problems at JINR has two unique features:
- high monochromaticity of the positron beam – the spectral width (FWHM) at the positron source output is 1.5–2 eV;
- positron energy at the target can be varied in the range of 0–30 keV, enabling studies of material structures.
The commissioning of the JINR DLNP PAS facility has significantly expanded the capabilities for investigating the structure of various structural materials, thereby broadening the possibilities for their quality control.
(Based on the materials of the candidate dissertation.)
Link to watch the video on the JINR resource:
https://disk.jinr.ru/index.php/s/mAW8kWnJAYkPMbj
Link to watch the video on VK:
https://vk.com/video-179241683_456239856
