Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Application of the zero-range potential model to positron annihilation
  on molecules   In this paper we use a zero-range potential (ZRP) method to model positron
interaction with molecules. This allows us to investigate the effect of
molecular vibrations on positron-molecule annihilation using the van der Waals
dimer Kr2 as an example. We also use the ZRP to explore positron binding to
polyatomics and examine the dependence of the binding energy on the size of the
molecule for alkanes. We find that a second bound state appears for a molecule
with ten carbons, similar to recent experimental evidence for such a state
emerging in alkanes with twelve carbons.

28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci