Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissociative recombination measurements of NH$^+$ using an ion storage
  ring   We have investigated dissociative recombination (DR) of NH$^+$ with electrons
using a merged beams configuration at the TSR heavy-ion storage ring located at
the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. We present
our measured absolute merged beams recombination rate coefficient for collision
energies from 0 to 12 eV. From these data we have extracted a cross section
which we have transformed to a plasma rate coefficient for the collisional
plasma temperature range from $T_{\rm pl} = 10$ to $18000$ K. We show that the
NH$^+$ DR rate coefficient data in current astrochemical models are
underestimated by up to a factor of $\sim 9$. Our new data will result in
predicted NH$^+$ abundances lower than calculated by present models. This is in
agreement with the sensitivity limits of all observations attempting to detect
NH$^+$ in interstellar clouds.

24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex