The helium atom and helium-like ions' interaction with XFEL radiation

2003 ◽  
Vol 50 (3-4) ◽  
pp. 353-364 ◽  
Author(s):  
S. Laulan ◽  
H. Bachau ◽  
B. Piraux ◽  
J. Bauer ◽  
G. Lagmago Kamta
Keyword(s):  
Helium Atom

Hardness and HOMO-LUMO Gap Probed by the Helium Atom Pushing the Molecular Surface of the First-Row Hydride Molecules

2003 ◽  
Vol 68 (12) ◽  
pp. 2344-2354 ◽  
Author(s):  
Edyta Małolepsza ◽  
Lucjan Piela
Keyword(s):  
Helium Atom ◽  
Pauli Exclusion Principle ◽  
Structure Change ◽  
Molecular Surface ◽  
Exclusion Principle ◽  
Probe Position ◽  
Repulsion Energy ◽  
Ionic Dissociation ◽  
Probe Site ◽  
Homo Lumo

A molecular surface defined as an isosurface of the valence repulsion energy may be hard or soft with respect to probe penetration. As a probe, the helium atom has been chosen. In addition, the Pauli exclusion principle makes the electronic structure change when the probe pushes the molecule (at a fixed positions of its nuclei). This results in a HOMO-LUMO gap dependence on the probe site on the isosurface. A smaller gap at a given probe position reflects a larger reactivity of the site with respect to the ionic dissociation.

scholarly journals Inter-adsorbate forces and coherent scattering in helium spin-echo experiments

2021 ◽  
Author(s):  
David J. Ward ◽  
Arjun Raghavan ◽  
Anton Tamtögl ◽  
Andrew P. Jardine ◽  
Emanuel Bahn ◽  
...  
Keyword(s):  
Helium Atom ◽  
Short Range ◽  
Spin Echo ◽  
Coherent Scattering ◽  
Helium Atom Scattering ◽  
Atom Scattering

Using helium atom scattering to identify adsorbate interactions and separate the effects of long and short range forces.

scholarly journals Negative ion productions in high velocity collision between small carbon clusters and Helium atom target

2012 ◽  
Vol 388 (10) ◽  
pp. 102036
Author(s):  
M Chabot ◽  
K Béroff ◽  
T Pino ◽  
G Féraud ◽  
N Dothi ◽  
...  
Keyword(s):  
Helium Atom ◽  
High Velocity ◽  
Negative Ion ◽  
Carbon Clusters

Low energy helium atom scattering from HCl monolayers physisorbed on graphite

1989 ◽  
Vol 224 (1-3) ◽  
pp. A620
Author(s):  
G.Y. Liu ◽  
P. Rowntree ◽  
G. Scoles ◽  
J. Xu
Keyword(s):  
Helium Atom ◽  
Low Energy ◽  
Helium Atom Scattering ◽  
Atom Scattering

A comparative study of helium atom diffusion via an interstitial mechanism in nickel and palladium

2006 ◽  
Vol 243 (3) ◽  
pp. 579-583 ◽  
Author(s):  
Jixing Xia ◽  
Wangyu Hu ◽  
Jianyu Yang ◽  
Bingyun Ao ◽  
Xiaolin Wang
Keyword(s):  
Comparative Study ◽  
Helium Atom ◽  
Atom Diffusion
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