Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Alpha induced reaction cross section measurements on 162Er for the
  astrophysical gamma process   The cross sections of the 162Er(a,g,)166Yb and 162Er(a,n)165Yb reactions have
been measured for the first time. The radiative alpha capture reaction cross
section was measured from Ec.m. = 16.09 down to Ec.m. = 11.21 MeV, close to the
astrophysically relevant region (which lies between 7.8 and 11.48 MeV at 3 GK
stellar temperature). The 162Er(a,n)165Yb reaction was studied above the
reaction threshold between Ec.m. = 12.19 and 16.09 MeV. The fact that the
162Er(a,g)166Yb cross sections were measured below the (a,n) threshold at first
time in this mass region opens the opportunity to study directly the a-widths
required for the determination of astrophysical reaction rates. The data
clearly show that compound nucleus formation in this reaction proceeds
differently than previously predicted.

4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom