Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental study of concrete activation compared to MCNP simulations
  for safety of neutron sources   The neutron activation of shielding materials and the generated decay gamma
radiation are well-known issues in terms of occupational exposure. Though the
trace elements of shielding concretes can be dominant sources of the produced
activity in such cases, their concentrations are often missing from the input
data of shielding-related Monte Carlo simulations. For this reason, three
concrete types were studied, that were considered in the European Spallation
Source (ESS) ERIC. Their composition - including the trace elements - were
determined via XRF, PGAA and NAA techniques. Realistic input data were
developed for these materials, containing the parent elements of all the
dominant radioisotopes, and were validated against measured data of neutron
irradiation experiments.

11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin