Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ionisation and dissociation of cometary gaseous organic molecules by
  solar wind particles I: Formic Acid   In order to simulate the effects of energetic charged particles present in
the solar wind colliding with the cometary gaseous formic acid molecule
(HCOOH), laboratory experiments have been performed. The absolute ionisation
and dissociation cross sections for this molecule interacting with solar wind
particles were measured employing fast electrons in the energy range of 0.5 to
2 keV and energetic protons with energies varying from 0.128 to 2 MeV. Despite
the fact that both projectiles lead to a very similar fragmentation pattern,
differences in the relative intensities of the fragments were observed. Formic
acid survives about 4-5 times more to the proton beam than to the energetic
electron collision.The minimum momentum transfer in the electron impact case
was estimated to be 3-38% larger than the minimum momentum transfer observed
with the equivelocity protons. The UV photodissociation rates and half-lives
for HCOOH are roughly closer to the values obtained with energetic electrons.
It is consequently important to take electron impact data into account when
developing chemical models to simulate the interplanetary conditions.

10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math