Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Projectile fragment emission in the fragmentation of 56Fe on Al, C and
  CH2 targets   The emission angle distribution of projectile fragments (PFs) and the
temperature of PFs emission source for fragmentation of $^{56}$Fe on
polyethylene, carbon and aluminum targets at the highest energy of 496 A MeV
are investigated using CR-39 plastic nuclear track detector. It is found that
the averaged emission angle of PFs increases with the decrease of PF charge for
the same target, and no obvious dependence of angular distribution on the mass
of target nucleus is found for the same PF. The cumulated squared transverse
momentum distribution of PF can be well represented by a single Rayleigh
distribution, the temperature of PFs emission source is extracted from the
distribution, which is about 1.0-8.0 MeV and do not depend on the mass of
target for PF with charge of 9<=Z<=25.

11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int