<abstract xmlns="http://www.w3.org/1999/xhtml">Some applications of controlled-energy positron beams in material studies are discussed. In porous organic polysilicates, measurements of 3γ annihilation by Doppler broadening (DB) method at the Trento University allowed to trace pore closing and filling by water vapor. In silicon coimplanted by He+ and H+, DB data combined with positron lifetime measurements at the München pulsed positron beam allowed to explain Si blistering. Presently measured samples of W for applications in thermonuclear reactors, irradiated by W+ and electrons, show vast changes of positron lifetimes, indicating complex dynamics of defects.</abstract>

Some applications of controlled-energy positron beams in material studies are discussed. In porous organic polysilicates, measurements of 3γ annihilation by Doppler broadening (DB) method at the Trento University allowed to trace pore closing and filling by water vapor. In silicon coimplanted by He+ and H+, DB data combined with positron lifetime measurements at the München pulsed positron beam allowed to explain Si blistering. Presently measured samples of W for applications in thermonuclear reactors, irradiated by W+ and electrons, show vast changes of positron lifetimes, indicating complex dynamics of defects.

Toward a European Network of Positron Laboratories

Institute of Physics, Faculty of Physics, Astronomy and Applied Informatics, Nicolaus Copernicus University in Toruń, 5/7 Grudziądzka Str., 87-100 Toruń, Poland

Physics Department, University of Trento and TIFPA-INFN, 38123 Povo (TN), via Sommarive 14, Italy

Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany

National Research Nuclear University “MEPHI”, Kashirskoe sh. 31, Moscow, Russia

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Toward a European Network of Positron Laboratories"}

Some applications of controlled-energy positron beams in material studies are discussed. In porous organic polysilicates, measurements of 3γ annihilation by...

Toward a European Network of Positron Laboratories

Published Online: Dec 01, 2015

Page range: 733 - 739

Received: Aug 04, 2015

Accepted: Aug 21, 2015

DOI: https://doi.org/10.1515/nuka-2015-0132

Keywords
positron beams, material science, thermonuclear reaction

© 2015 Grzegorz P. Karwasz et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Toward a European Network of Positron Laboratories

Published Online: Dec 01, 2015

Page range: 733 - 739

Received: Aug 04, 2015

Accepted: Aug 21, 2015

DOI: https://doi.org/10.1515/nuka-2015-0132

Keywordspositron beams, material science, thermonuclear reaction

© 2015 Grzegorz P. Karwasz et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
positron beams, material science, thermonuclear reaction