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Empirical Determination of Scattering Matrices from Magnetic Molecular Interferometry for Gas–Surface Collisions
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Gil Alexandrowicz
The Journal of Physical Chemistry C, Volume: 128, Issue: 49, Pages: 20913 - 20922
Swansea University Authors:
Helen Chadwick , Gil Alexandrowicz
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DOI (Published version): 10.1021/acs.jpcc.4c06913
Abstract
The rotational orientation dependence of H2 scattering into different diffraction channels on a Cu(511) surface is studied using a magnetic manipulation interferometry technique. For some channels, markedly different signals are measured, whereas for others, they are more similar. The data are analy...
| Published in: | The Journal of Physical Chemistry C |
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| ISSN: | 1932-7447 1932-7455 |
| Published: |
American Chemical Society (ACS)
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68321 |
| Abstract: |
The rotational orientation dependence of H2 scattering into different diffraction channels on a Cu(511) surface is studied using a magnetic manipulation interferometry technique. For some channels, markedly different signals are measured, whereas for others, they are more similar. The data are analyzed to obtain scattering matrices, which quantify how the amplitude and phase of the wave function change during the gas–surface collision and are extremely sensitive to the underlying potential. Fits to simulated data with noise at levels comparable to those obtained in the experimental data are also presented, which provide an estimate of the error on the scattering matrix parameters that are obtained, with the uncertainties in the values tending to be lower for the higher order diffraction peaks. The results presented here provide extremely stringent benchmarks for the development of accurate theoretical models, with the number of different channels studied reducing the likelihood of an inaccurate model fortuitously reproducing all the data. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
The work was funded by an EPSRC standard grant (EP/X037886/1) and a UKRI Future Leaders Fellowship (MR/X03609X/1). The support of the Supercomputing Wales project, which is part funded by the European Regional Development Fund (ERDF) via the Welsh Government is also acknowledged. |
| Issue: |
49 |
| Start Page: |
20913 |
| End Page: |
20922 |