Verification of the theory of primary radiation damage by comparison with experimental data

0508844 - ÚJF 2020 RIV NL eng J - Journal Article
Ogorodnikova, O. V. - Majerle, Mitja - Gann, V. V. - Čížek, J. - Hruška, P. - Simakov, S. P. - Štefánik, Milan - Zach, Václav
Verification of the theory of primary radiation damage by comparison with experimental data.
Journal of Nuclear Materials. Roč. 525, č. 11 (2019), s. 22-31. ISSN 0022-3115. E-ISSN 1873-4820
R&D Projects: GA MŠMT(CZ) EF16_013/0001679; GA MŠMT LM2015056; GA MŠMT LM2015076
Institutional support: RVO:61389005
Keywords : Microstructure * Damage initiation * Defects * Positron annihilation spectroscopy * Metals * Irradiation effects
OECD category: Nuclear physics
Impact factor: 2.485, year: 2019
Method of publishing: Limited access
https://doi.org/10.1016/j.jnucmat.2019.07.019

Understanding of radiation damage in a solid is important for development of advanced material technologies, namely, for space application, electron microscopy, semiconductor processing, fission and nuclear fusion. Space materials must withstand exposure to high-energy protons. Construction materials of future thermonuclear reactors must withstand exposure to high-energy neutrons. Many properties of materials including mechanical properties are governed by the presence and behavior of lattice defects. Hence, the study of the radiation-induced defects is an important task combining two fields: radiation physics and solid state physics. The paper presents new knowledge on primary defect formation in the main materials for advanced fission and nuclear fusion reactors, bcc tungsten (W) and bcc iron (Fe). The objective of this work is to compare the new experimental data of neutron- and proton-induced defects in W and Fe using well-established method of positron-annihilation lifetime-spectroscopy (PALS) in combination with the literature data with two models of radiation damage, the classical Norgett-Robinson-Torrens (NRT-dpa) model and recently developed athermal recombination corrected (arcdpa) model. It is shown that experimental data for neutron- and proton-irradiated Fe are better described by arc-dpa model than NRT-dpa model. Whereas experimental data for neutron- and proton-irradiated W are between the NRT-dpa and arc-dpa predictions. The obtained results shed new light on the formation of the primary radiation defects in materials and indicate the need for further development of the theory of radiation damage in a solid.
Permanent Link: http://hdl.handle.net/11104/0299646