SEMINAR ANNOUNCEMENT:“Selective adsorption on the scattering of Hydrogen isotopes on W(110) surface”

Raúl Bombín

Institut des Science Moléculaires - Université de Bordearux

Donostia International Physics Center

“Selective adsorption on the scattering of Hydrogen isotopes on W(110) surface”

Abstract

 An understanding of the dynamics of hydrogen atom scattering on metal surfaces is of great importance for a number of applications, including catalysis and material science. We investigate the scattering of hydrogen atoms on the W(110) surface, that is of interest for the nuclear fusion industry, employing both classical and quantum dynamics approaches[1]. We focus on several key observables, including the sticking probability and diffraction channels, which are used to characterize the scattering process. The evaluation of the importance of quantum effects is done by direct comparison with the results of classical molecular dynamics results, that have been extensively done in the past[2,3]. In the talk, I show that the low energy quantum resonances that appear in the sticking curve can be rationalized in terms of diffraction-mediated selective adsorption and focused sticking mechanisms. I further discuss how diffraction spectra can help to understand from where do differences between classical and quantum treatments emerge. Furthermore, the study of the vibrational excitation spectra of H isotopes adsorbed on the tungsten surface helps to identify low energy resonances that appear in the sticking curve.

References

[1] R. Bombín et al.arXiv:2603.05426 [physics.chem-ph] (2026). [2] R. Martin-Barrios et al. Phys. Chem. Chem. Phys. 24, 20813-20819 (2022).

[3] C. Ibarguen Becerra et al. Surf. Science. 701 121678 (2020).