Spin exchange and chemi-ionization during collisions of polarized metastable helium atoms with ground-state cesium atoms

1999 ◽  
Vol 44 (9) ◽  
pp. 1033-1037 ◽  
Author(s):  
S. P. Dmitriev ◽  
N. A. Dovator ◽  
V. A. Kartoshkin
Keyword(s):  
Ground State ◽  
Spin Exchange ◽  
Metastable Helium ◽  
Helium Atoms ◽  
Cesium Atoms

Spin exchange upon collision of two cesium atoms in the ground state

2015 ◽  
Vol 60 (6) ◽  
pp. 826-829 ◽  
Author(s):  
S. P. Dmitriev ◽  
N. A. Dovator ◽  
V. A. Kartoshkin
Keyword(s):  
Ground State ◽  
Spin Exchange ◽  
Cesium Atoms

Theoretical investigation of the pressure broadening D 1 and D 2 lines of cesium atoms colliding with ground-state helium atoms

2019 ◽  
Vol 28 (10) ◽  
pp. 103103
Author(s):  
Moussaoui Abdelaziz ◽  
Alioua Kamel ◽  
Allouche Abdul-rahman ◽  
Bouledroua Moncef
Keyword(s):  
Theoretical Investigation ◽  
Ground State ◽  
Pressure Broadening ◽  
Helium Atoms ◽  
Cesium Atoms

scholarly journals An atom passing through a hole in a dielectric membrane: Impact of dispersion forces on mask-based matter-wave lithography

2022 ◽  
Author(s):  
Johannes Fiedler ◽  
Bodil Holst
Keyword(s):  
Ground State ◽  
Semiconductor Industry ◽  
Matter Wave ◽  
Dispersion Force ◽  
Large Area ◽  
Force Interaction ◽  
Metastable Helium ◽  
Helium Atoms ◽  
Hole Radius ◽  
Mask Material

Abstract Fast, large area patterning of arbitrary structures down to the nanometre scale is of great interest for a range of applications including the semiconductor industry, quantum electronics, nanophotonics and others. It was recently proposed that nanometre-resolution mask lithography can be realised by sending metastable helium atoms through a binary holography mask consisting of a pattern of holes. However, these first calculations were done using a simple scalar wave approach, which did not consider the dispersion force interaction between the atoms and the mask material. To access the true potential of the idea, it is necessary to access how this interaction affects the atoms. Here we present a theoretical study of the dispersion force interaction between an atom and a dielectric membrane with a hole. We look at metastable and ground state helium, using experimentally realistic wavelengths (0.05-1 nm) and membrane thicknesses (5-50 nm). We find that the effective hole radius is reduced by around 1-7 nm for metastable helium and 0.5-3.5 nm for ground-state helium. As expected, the reduction is largest for thick membranes and slow atoms.

The interaction of metastable helium atoms with alkali atoms

1987 ◽  
Vol 5 (1) ◽  
pp. 9-20 ◽  
Author(s):  
M. -W. Ruf ◽  
A. J. Yencha ◽  
H. Hotop
Keyword(s):  
Metastable Helium ◽  
Helium Atoms ◽  
Alkali Atoms
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