Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum   Statistical $\gamma$-decay from highly excited states is determined by the
nuclear level density (NLD) and the $\gamma$-ray strength function
($\gamma$SF). These average quantities have been measured for several nuclei
using the Oslo method. For the first time, we exploit the NLD and $\gamma$SF to
evaluate the $\gamma$-width in the energy region below the neutron binding
energy, often called the quasi-continuum region. The lifetimes of states in the
quasi-continuum are important benchmarks for a theoretical description of
nuclear structure and dynamics at high temperature. The lifetimes may also have
impact on reaction rates for the rapid neutron-capture process, now
demonstrated to take place in neutron star mergers.

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The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex