Atom-surface scattering with velocity-selected H and D atomic beams from LiF and NaF (001)

A model for the physical adsorption of atomic hydrogen

“…The depth of the holding potential quoted [37] for H/LiF is 18 meV (6.6 X 10m4 au); our value calculated for the dielectric model is 2.8 X 10m4 au. The position of the potential minimum relative to the substrate boundary is not derived directly from the experimental data, but a model fitting some aspects of the data put [37] the location at 2.7 A (5.1 a,-,) above the centers of the topmost layer of atoms.…”

“…The position of the potential minimum relative to the substrate boundary is not derived directly from the experimental data, but a model fitting some aspects of the data put [37] the location at 2.7 A (5.1 a,-,) above the centers of the topmost layer of atoms. Our value of 5.2 a0 from the wall translates to a much larger value than this, even allowing for some uncertainty in specifying the location of the imaging surface relative to the atomic positions in an insulator [ 191. Even with the specification of the parameter E by eq.…”

Scattering of Neutral Atoms by an Exponential Corrugated Potential

“…However, Unitarity 0.1X10 9 0.22X10" 33 0.15X10' 26 0.93X10" 21 0.39X10"" 17 0.51X10" 14 0.68X10" 11 0.42X10" 6 1.000 0021 0J4X10" 9 1.000 002 5 X (cm" 1 ) 0.3X10 9 0.2X 10" 25 0.16X10" 20 0.11X10" 16 0.26X10" 13 0.58X10" 10 0.14X10' 6 0.41X10" 3 1.000 58 0.31X10" 4 1.00104 0.5X10 9 0.24X10' 24 0.55X10" 20 0.25X10" 16 0.66X10" 13 0.19X10" 9 0.51X10" 6 0.10X10" 2 1.00133 0.21X10" 3 1.002 56 HCWP 0.11X10" 21 0.73X10* 19 0.51X10' 17 0.65X10' 13 0.4X10' 9 0.12X10" 5 0.19X10" 2 0.997 243 0.81X10" 3 1.000 000 00 TABLE II. Results for He scattered by a triangular profile of height ha and perpendicular incidence.…”

An ultrahigh vacuum apparatus for H atom scattering from surfaces

“…H atom sources providing narrow velocity distributions have not been available; previously, discharge-based H atom sources with electromagnetic velocity filters were used. 10,11 Detection of H atoms is also challenging: Bolometers, 11 ZnO conductivity detectors, 12 and photographic plates 13 are sensitive to H atoms, but their slow a) Author to whom correspondence should be addressed: oliver.buenermann@ chemie.uni-goettingen.de temporal response has restricted all previous experiments to spatially resolved diffraction measurements. [13][14][15][16][17] In this paper, we show how to produce nearly monoenergetic pulsed H atom beams in an apparatus capable of sensitive time-and angle-resolved H atom detection.…”