Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mixed-valence correlations in charge-transferring atom-surface
  collisions   Motivated by experimental evidence for a mixed-valence state to occur in the
neutralization of strontium ions on gold surfaces we analyze this type of
charge-transferring atom-surface collision from a many-body theoretical point
of view using quantum-kinetic equations together with a pseudo-particle
representation for the electronic configurations of the atomic projectile.
Particular attention is paid to the temperature dependence of the
neutralization probability which--experimentally--seems to signal
mixed-valence-type correlations affecting the charge-transfer between the gold
surface and the strontium projectile. We also investigate the neutralization of
magnesium ions on a gold surface which shows no evidence for a mixed-valence
state. Whereas for magnesium excellent agreement between theory and experiment
could be obtained, for strontium we could not reproduce the experimental data.
Our results indicate mixed-valence correlations to be in principle present, but
for the model mimicking most closely the experimental situation they are not
strong enough to affect the neutralization process quantitatively.

37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th