Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability of As$_n$ [n=4, 8, 20, 28, 32, 36, 60] Cage Structures   We present all-electron density functional study of the geometry, electronic
structure, vibrational modes, polarizabilities as well as the infrared and
Raman spectra of fullerene-like arsenic cages. The stability of As$_n$ cages
for sizes 4, 8, 20, 28, 32, 36, and 60 wherein each As atom is three-fold
coordinated is examined. We find that all the cages studied are vibrationally
stable and while all the clusters are energetically stable with respect to
isolated arsenic atoms, only As$_{20}$ is energetically stable against
dissociation into As$_4$. We suggest that the Raman spectra might be a means
for observing the As$_{20}$ molecule in gas phase.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: econ
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th