Near-surface investigation of positron diffusion length in helium-implanted Fe9Cr and its ODS variant

0542988 - FZÚ 2022 RIV NL eng J - Journal Article
Degmová, J. - Kršjak, V. - Shen, T.L. - Šimeg Veterniková, J. - Gatciová, A. - Sojak, S. - Hruška, Petr
Near-surface investigation of positron diffusion length in helium-implanted Fe9Cr and its ODS variant.
Applied Surface Science. Roč. 538, Feb (2021), č. článku 148004. ISSN 0169-4332. E-ISSN 1873-5584
Institutional support: RVO:68378271
Keywords : f/m steels * He⁺ implantation * slow positron Doppler broadening technique * positron diffusion length
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 7.392, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.apsusc.2020.148004

In the present paper, we employ the depth sensitive slow positron Doppler broadening technique to characterise the positron diffusion in various near-surface layers of He+ implanted f/m steels. One of the frequently used positron annihilation parameters, with a high sensitivity to radiation-induced defects in a wide range of displacement damage, is the positron diffusion length. This parameter expresses the probability of the back diffusion of positrons to the surface and reflects the microstructural damage.
Permanent Link: http://hdl.handle.net/11104/0320306