20.500.12556/DiRROS-24678 Influence of near-surface helium on the deuterium retention and uptake in tungsten The effect of near-surface helium (He) on deuterium (D) retention and uptake into the bulk of tungsten (W) was investigated. To quantify the He influence on D uptake, He was implanted close to the surface with 3 keV energy at different fluences and different temperatures. 20 MeV W irradiation was performed at room temperature after He implantation to create defects within the first 2.3 µm. Samples were then exposed to a low flux, low energy (300 eV/D) D ion beam at 450 K. The defects created by W ions trap penetrating D and make it hence possible to quantify D transport into depth below the He layer using 3He nuclear reaction analysis. Elastic recoil detection analysis enabled us to measure the D and He concentration depth profiles near the surface. Results show that D gets preferentially retained where He is implanted with D concentrations up to 10 at.%. At the same time D uptake beyond the He zone is reduced by a factor of 15 compared to a He-free W sample. deuterium retention displacement damage true false true Elsevier Nizozemska Angleški jezik Ni določen © 2025 The Author(s). Neznano 2025-12-11 15:38:51 2025-12-11 15:38:51 2025-12-12 03:44:13 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Andreja Šestan, Janez Zavašnik, Mitja Kelemen; Opis vira z dne 10. 11. 2025; str. 1-9 Vol. 45, [article no.] 101981 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-07-10 2025-09-03 2025-09-05 620.1/.2 2352-1791 10.1016/j.nme.2025.101981 256538627 https://www.sciencedirect.com/science/article/pii/S2352179125001231 1 253f472c-d69f-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36845 RAZ_Markelj_Sabina_2025.pdf RAZ_Markelj_Sabina_2025.pdf 1 27C2C650DA2C7057E31719565C31BA09 d7f5998aac9120532bc9b64f30be0de3369ef37b6801394038c2d61eed2dd8ad 2a20c34c-d6a0-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=36846 Institut Jožef Stefan 0 0 0