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An ultrahigh vacuum apparatus for H atom scattering from surfaces
Oliver Bünermann1, Hongyan Jiang1, Yvonne Dorenkamp1
1Institute for Physical Chemistry, Georg-August University of Göttingen, Tammannstr. 6, 37077 Göttingen, Germany.
The Review of Scientific Instruments
|October 4, 2018
Summary
We developed a new apparatus for studying atom scattering from surfaces. This system offers high-resolution measurements of scattering energy and angular distributions for hydrogen and deuterium atoms.
Area of Science:
- Surface science
- Atomic physics
- Physical chemistry
Background:
- Understanding atom-surface interactions is crucial in various scientific fields.
- Previous methods lacked the resolution to fully characterize inelastic scattering events.
Purpose of the Study:
- To present a novel apparatus for high-resolution inelastic scattering studies of H and D atoms from surfaces.
- To enable detailed investigations of energy and angular distributions in atom-surface collisions.
Main Methods:
- Utilizes a photolysis-based atom source for generating H/D atom beams.
- Employs Rydberg atom tagging time-of-flight for high-resolution detection.
- Features a six-axis manipulator for precise sample positioning and temperature control (45 K–1500 K).
Main Results:
- Achieves H/D atom beam energies from 500 meV to 7 eV with energy spreads as low as 2 meV.
- Provides high energy resolution (up to 1000) and adjustable angular resolution (0.3°–3°).
- Enables intense atom beams with up to 10^8 atoms per pulse.
Conclusions:
- The developed apparatus significantly advances the capability to study inelastic atom scattering.
- Offers unprecedented resolution for probing atom-surface dynamics.
- Opens new avenues for research in surface chemistry and physics.
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