Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Review and new concepts for neutron-capture measurements of
  astrophysical interest   The idea of slow-neutron capture nucleosynthesis formulated in 1957 triggered
a tremendous experimental effort in different laboratories worldwide to measure
the relevant nuclear physics input quantities, namely ($n,\gamma$) cross
sections over the stellar temperature range (from few eV up to several hundred
keV) for most of the isotopes involved from Fe up to Bi. A brief historical
review focused on total energy detectors will be presented to illustrate how,
advances in instrumentation have led, over the years, to the assessment and
discovery of many new aspects of $s$-process nucleosynthesis and to the
progressive refinement of theoretical models of stellar evolution. A summary
will be presented on current efforts to develop new detection concepts, such as
the Total-Energy Detector with $\gamma$-ray imaging capability (i-TED). The
latter is based on the simultaneous combination of Compton imaging with neutron
time-of-flight (TOF) techniques, in order to achieve a superior level of
sensitivity and selectivity in the measurement of stellar neutron capture
rates.

4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci